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methyl methacrylate polymerization</title> <meta name="description" content="Search results for: batch bulk methyl methacrylate polymerization"> <meta name="keywords" content="batch bulk methyl methacrylate polymerization"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" 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class="col-md-9 mx-auto"> <form method="get" action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="batch bulk methyl methacrylate polymerization"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 1966</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: batch bulk methyl methacrylate polymerization</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1966</span> The Role of Initiator in the Synthesis of Poly(Methyl Methacrylate)-Layered Silicate Nanocomposites through Bulk Polymerization</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tsung-Yen%20Tsai">Tsung-Yen Tsai</a>, <a href="https://publications.waset.org/abstracts/search?q=Naveen%20Bunekar"> Naveen Bunekar</a>, <a href="https://publications.waset.org/abstracts/search?q=Ming%20Hsuan%20Chang"> Ming Hsuan Chang</a>, <a href="https://publications.waset.org/abstracts/search?q=Wen-Kuang%20Wang"> Wen-Kuang Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Satoshi%20Onda"> Satoshi Onda</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The structure-property relationship and initiator effect on bulk polymerized poly(methyl methacrylate) (PMMA)–oragnomodified layered silicate nanocomposites was investigated. In this study, we used 2, 2'-azobis (4-methoxy-2,4-dimethyl valeronitrile and benzoyl peroxide initiators for bulk polymerization. The bulk polymerized nanocomposites’ morphology was investigated by X-ray diffraction and transmission electron microscopy. The type of initiator strongly influences the physiochemical properties of the polymer nanocomposite. The thermal degradation of PMMA in the presence of nanofiller was studied. 5 wt% weight loss temperature (T5d) increased as compared to pure PMMA. The peak degradation temperature increased for the nanocomposites. Differential scanning calorimetry and dynamic mechanical analysis were performed to investigate the glass transition temperature and the nature of the constrained region as the reinforcement mechanism respectively. Furthermore, the optical properties such as UV-Vis and Total Luminous Transmission of nanocomposites are examined. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=initiator" title="initiator">initiator</a>, <a href="https://publications.waset.org/abstracts/search?q=bulk%20polymerization" title=" bulk polymerization"> bulk polymerization</a>, <a href="https://publications.waset.org/abstracts/search?q=layered%20silicates" title=" layered silicates"> layered silicates</a>, <a href="https://publications.waset.org/abstracts/search?q=methyl%20methacrylate" title=" methyl methacrylate"> methyl methacrylate</a> </p> <a href="https://publications.waset.org/abstracts/94517/the-role-of-initiator-in-the-synthesis-of-polymethyl-methacrylate-layered-silicate-nanocomposites-through-bulk-polymerization" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/94517.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">292</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1965</span> Performance Comparison of Different Regression Methods for a Polymerization Process with Adaptive Sampling</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Florin%20Leon">Florin Leon</a>, <a href="https://publications.waset.org/abstracts/search?q=Silvia%20Curteanu"> Silvia Curteanu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Developing complete mechanistic models for polymerization reactors is not easy, because complex reactions occur simultaneously; there is a large number of kinetic parameters involved and sometimes the chemical and physical phenomena for mixtures involving polymers are poorly understood. To overcome these difficulties, empirical models based on sampled data can be used instead, namely regression methods typical of machine learning field. They have the ability to learn the trends of a process without any knowledge about its particular physical and chemical laws. Therefore, they are useful for modeling complex processes, such as the free radical polymerization of methyl methacrylate achieved in a batch bulk process. The goal is to generate accurate predictions of monomer conversion, numerical average molecular weight and gravimetrical average molecular weight. This process is associated with non-linear gel and glass effects. For this purpose, an adaptive sampling technique is presented, which can select more samples around the regions where the values have a higher variation. Several machine learning methods are used for the modeling and their performance is compared: support vector machines, k-nearest neighbor, k-nearest neighbor and random forest, as well as an original algorithm, large margin nearest neighbor regression. The suggested method provides very good results compared to the other well-known regression algorithms. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=batch%20bulk%20methyl%20methacrylate%20polymerization" title="batch bulk methyl methacrylate polymerization">batch bulk methyl methacrylate polymerization</a>, <a href="https://publications.waset.org/abstracts/search?q=adaptive%20sampling" title=" adaptive sampling"> adaptive sampling</a>, <a href="https://publications.waset.org/abstracts/search?q=machine%20learning" title=" machine learning"> machine learning</a>, <a href="https://publications.waset.org/abstracts/search?q=large%20margin%20nearest%20neighbor%20regression" title=" large margin nearest neighbor regression"> large margin nearest neighbor regression</a> </p> <a href="https://publications.waset.org/abstracts/54074/performance-comparison-of-different-regression-methods-for-a-polymerization-process-with-adaptive-sampling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/54074.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">304</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1964</span> Poly(Methyl Methacrylate)/Graphene Microparticles Having a Core/Shell Structure Prepared with Carboxylated Graphene as a Pickering Stabilizer</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gansukh%20Erdenedelger">Gansukh Erdenedelger</a>, <a href="https://publications.waset.org/abstracts/search?q=Doljinsuren%20Sukhbaatar"> Doljinsuren Sukhbaatar</a>, <a href="https://publications.waset.org/abstracts/search?q=Trung%20Dung%20Dao"> Trung Dung Dao</a>, <a href="https://publications.waset.org/abstracts/search?q=Byeong-Kyu%20Lee"> Byeong-Kyu Lee</a>, <a href="https://publications.waset.org/abstracts/search?q=Han%20Mo%20Jeong"> Han Mo Jeong</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Two kinds of carboxylated thermally reduced graphenes (C-TRGs) having different lateral sizes are examined as a Pickering stabilizer in the suspension polymerization of methyl methacrylate. The size and the shape of the prepared composite particles are irregular due to agglomeration, more evidently when the larger C-TRG is used. In addition, C-TRG is distributed not only on the surface but also inside the composite particles. It indicates that the C-TRG alone is not a stable Pickering agent. However, a very small dosage of acrylic acid remedies all these issues, because acrylic acid interacts with C-TRG and synergizes the stabilizing effect. The compression molded composite of the core/shell poly(methyl methacrylate)/C-TRG particles exhibits a very low percolation threshold of electrical conductivity of 0.03 vol%. It demonstrates that the C-TRG shells of the composite particles effectively form a segregated conductive network throughout the composite. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=pickering" title="pickering">pickering</a>, <a href="https://publications.waset.org/abstracts/search?q=graphene" title=" graphene"> graphene</a>, <a href="https://publications.waset.org/abstracts/search?q=polymerization" title=" polymerization"> polymerization</a>, <a href="https://publications.waset.org/abstracts/search?q=PMMA" title=" PMMA"> PMMA</a> </p> <a href="https://publications.waset.org/abstracts/45928/polymethyl-methacrylategraphene-microparticles-having-a-coreshell-structure-prepared-with-carboxylated-graphene-as-a-pickering-stabilizer" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/45928.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">297</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1963</span> Methyl Red Dye Adsorption On PMMA/GO and PMMA/GO-Fe3O4 Nanocomposites: Equilibrium Isotherm Studies</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mostafa%20Rajabi">Mostafa Rajabi</a>, <a href="https://publications.waset.org/abstracts/search?q=Kazem%20Mahanpoor"> Kazem Mahanpoor</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Performances of the methyl red (MR) dye adsorption on poly(methyl methacrylate)/graphene oxide (PMMA/GO) and poly(methyl methacrylate)/graphene oxide-Fe3O4 (PMMA/GO-Fe3O4) nanocomposites as adsorbents were investigated. Our results showed that for adsorption of MR dye on PMMA/GO-Fe3O4 and PMMA/GO nanocomposites, 80 minutes, 298 K, and pH 2 were the best contact time, temperature and pH value for process, respectively, because the optimum adsorption of the MR dye with both nanocomposite adsorbents were observed in these values of the parameters. The equilibrium study results showed that PMMA/GO-Fe3O4 and PMMA/GO were suitable adsorbents for MR dye removing and were best in agreement with the Langmuir isotherm model. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=adsorption" title="adsorption">adsorption</a>, <a href="https://publications.waset.org/abstracts/search?q=isotherm" title=" isotherm"> isotherm</a>, <a href="https://publications.waset.org/abstracts/search?q=methyl%20methacrylate" title=" methyl methacrylate"> methyl methacrylate</a>, <a href="https://publications.waset.org/abstracts/search?q=methyl%20red" title=" methyl red"> methyl red</a>, <a href="https://publications.waset.org/abstracts/search?q=nanocomposite" title=" nanocomposite"> nanocomposite</a>, <a href="https://publications.waset.org/abstracts/search?q=nano%20magnetic%20Fe3O4" title=" nano magnetic Fe3O4"> nano magnetic Fe3O4</a> </p> <a href="https://publications.waset.org/abstracts/140772/methyl-red-dye-adsorption-on-pmmago-and-pmmago-fe3o4-nanocomposites-equilibrium-isotherm-studies" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/140772.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">187</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1962</span> Magnetic Nanoparticles for Protein C Purification</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Duygu%20%C3%87imen">Duygu Çimen</a>, <a href="https://publications.waset.org/abstracts/search?q=Nilay%20Bereli"> Nilay Bereli</a>, <a href="https://publications.waset.org/abstracts/search?q=Adil%20Denizli"> Adil Denizli</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study is to synthesis magnetic nanoparticles for purify protein C. For this aim, N-Methacryloyl-(L)-histidine methyl ester (MAH) containing 2-hydroxyethyl methacrylate (HEMA) based magnetic nanoparticles were synthesized by using micro-emulsion polymerization technique for templating protein C via metal chelation. The obtained nanoparticles were characterized with Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), zeta-size analysis and electron spin resonance (ESR) spectroscopy. After that, they were used for protein C purification from aqueous solution to evaluate/optimize the adsorption condition. Hereby, the effecting factors such as concentration, pH, ionic strength, temperature, and reusability were evaluated. As the last step, protein C was determined with sodium dodecyl sulfate-polyacrylamide gel electrophoresis. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=immobilized%20metal%20affinity%20chromatography%20%28IMAC%29" title="immobilized metal affinity chromatography (IMAC)">immobilized metal affinity chromatography (IMAC)</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20nanoparticle" title=" magnetic nanoparticle"> magnetic nanoparticle</a>, <a href="https://publications.waset.org/abstracts/search?q=protein%20C" title=" protein C"> protein C</a>, <a href="https://publications.waset.org/abstracts/search?q=hydroxyethyl%20methacrylate%20%28HEMA%29" title=" hydroxyethyl methacrylate (HEMA)"> hydroxyethyl methacrylate (HEMA)</a> </p> <a href="https://publications.waset.org/abstracts/30767/magnetic-nanoparticles-for-protein-c-purification" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/30767.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">425</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1961</span> Electrospun Nanofibers from Amphiphlic Block Copolymers and Their Graphene Nanocomposites</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hussein%20M.%20Etmimi">Hussein M. Etmimi</a>, <a href="https://publications.waset.org/abstracts/search?q=Peter%20E.%20Mallon"> Peter E. Mallon </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Electrospinning uses an electrical charge to draw very fine fibers (typically on the micro or nano scale) from a liquid or molten precursor. Over the years, this method has become a widely used and a successful technique to process polymer materials and their composites into nanofibers. The main focus of this work is to study the electrospinning of multi-phase amphiphilic copolymers and their nanocomposites, which contain graphene as the nanofiller material. In such amphiphilic materials, the constituents segments are incompatible and thus the solid state morphology will be determined by the composition of the various constituents as well as the method of preparation. In this study, amphiphilic block copolymers of poly(dimethyl siloxane) and poly(methyl methacrylate) (PDMS-b-PMMA) with well-defined structures were synthesized and the solution electrospinning of these materials and their properties were investigated. Atom transfer radical polymerization (ATRP) was used to obtain the controlled block copolymers with relatively high molar masses and narrow dispersity. First, PDMS macroinitiators with different chain length of 1000, 5000 and 10000 g/mol were synthesized by the reaction of monocarbinol terminated PDMS with α-bromoisobutyryl bromide initiator. The obtained macroinitiators were used for the polymerization of methyl methacrylate monomer to obtain the desired block copolymers using the ATRP process. Graphene oxide (GO) of different loading was then added to the copolymer solution and the resultant nanocomposites were successfully electrospun into nanofibers. The electrospinning was achieved using dimethylformamide/chloroform mixture (60:40 vl%) as electrospinning solution medium. Scanning electron microscopy (SEM) showed the successful formation of the electrospun fibers with dimensions in the nanometer range. X-ray diffraction indicated that the GO nanosheets were of an exfoliated structure, irrespective of the filler loading. Thermogravimetric analysis also showed that the thermal stability of the nanofibers was improved in the presence of GO, which was not a function of the filler loading. Differential scanning calorimetry also showed that the mechanical properties (measured as glass transition temperature) of the nanofibers was improved significantly in the presence of GO, which was a function of the filler loading. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=elctrospinning" title="elctrospinning">elctrospinning</a>, <a href="https://publications.waset.org/abstracts/search?q=graphene%20oxide" title=" graphene oxide"> graphene oxide</a>, <a href="https://publications.waset.org/abstracts/search?q=nanofibers" title=" nanofibers"> nanofibers</a>, <a href="https://publications.waset.org/abstracts/search?q=polymethyl%20methacrylate%20%28PMMA%29" title=" polymethyl methacrylate (PMMA)"> polymethyl methacrylate (PMMA)</a> </p> <a href="https://publications.waset.org/abstracts/35345/electrospun-nanofibers-from-amphiphlic-block-copolymers-and-their-graphene-nanocomposites" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/35345.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">306</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1960</span> Preparation of Biodegradable Methacrylic Nanoparticles by Semicontinuous Heterophase Polymerization for Drugs Loading: The Case of Acetylsalicylic Acid</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=J.%20Roberto%20Lopez">J. Roberto Lopez</a>, <a href="https://publications.waset.org/abstracts/search?q=Hened%20Saade"> Hened Saade</a>, <a href="https://publications.waset.org/abstracts/search?q=Graciela%20Morales"> Graciela Morales</a>, <a href="https://publications.waset.org/abstracts/search?q=Javier%20Enriquez"> Javier Enriquez</a>, <a href="https://publications.waset.org/abstracts/search?q=Raul%20G.%20Lopez"> Raul G. Lopez</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Implementation of systems based on nanostructures for drug delivery applications have taken relevance in recent studies focused on biomedical applications. Although there are several nanostructures as drugs carriers, the use of polymeric nanoparticles (PNP) has been widely studied for this purpose, however, the main issue for these nanostructures is the size control below 50 nm with a narrow distribution size, due to they must go through different physiological barriers and avoid to be filtered by kidneys (< 10 nm) or the spleen (> 100 nm). Thus, considering these and other factors, it can be mentioned that drug-loaded nanostructures with sizes varying between 10 and 50 nm are preferred in the development and study of PNP/drugs systems. In this sense, the Semicontinuous Heterophase Polymerization (SHP) offers the possibility to obtain PNP in the desired size range. Considering the above explained, methacrylic copolymer nanoparticles were obtained under SHP. The reactions were carried out in a jacketed glass reactor with the required quantities of water, ammonium persulfate as initiator, sodium dodecyl sulfate/sodium dioctyl sulfosuccinate as surfactants, methyl methacrylate and methacrylic acid as monomers with molar ratio of 2/1, respectively. The monomer solution was dosed dropwise during reaction at 70 °C with a mechanical stirring of 650 rpm. Nanoparticles of poly(methyl methacrylate-co-methacrylic acid) were loaded with acetylsalicylic acid (ASA, aspirin) by a chemical adsorption technique. The purified latex was put in contact with a solution of ASA in dichloromethane (DCM) at 0.1, 0.2, 0.4 or 0.6 wt-%, at 35°C during 12 hours. According to the boiling point of DCM, as well as DCM and water densities, the loading process is completed when the whole DCM is evaporated. The hydrodynamic diameter was measured after polymerization by quasi-elastic light scattering and transmission electron microscopy, before and after loading procedures with ASA. The quantitative and qualitative analyses of PNP loaded with ASA were measured by infrared spectroscopy, differential scattering calorimetry and thermogravimetric analysis. Also, the molar mass distributions of polymers were determined in a gel permeation chromatograph apparatus. The load capacity and efficiency were determined by gravimetric analysis. The hydrodynamic diameter results for methacrylic PNP without ASA showed a narrow distribution with an average particle size around 10 nm and a composition methyl methacrylate/methacrylic acid molar ratio equal to 2/1, same composition of Eudragit S100, which is a commercial compound widely used as excipient. Moreover, the latex was stabilized in a relative high solids content (around 11 %), a monomer conversion almost 95 % and a number molecular weight around 400 Kg/mol. The average particle size in the PNP/aspirin systems fluctuated between 18 and 24 nm depending on the initial percentage of aspirin in the loading process, being the drug content as high as 24 % with an efficiency loading of 36 %. These average sizes results have not been reported in the literature, thus, the methacrylic nanoparticles here reported are capable to be loaded with a considerable amount of ASA and be used as a drug carrier. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aspirin" title="aspirin">aspirin</a>, <a href="https://publications.waset.org/abstracts/search?q=biocompatibility" title=" biocompatibility"> biocompatibility</a>, <a href="https://publications.waset.org/abstracts/search?q=biodegradable" title=" biodegradable"> biodegradable</a>, <a href="https://publications.waset.org/abstracts/search?q=Eudragit%20S100" title=" Eudragit S100"> Eudragit S100</a>, <a href="https://publications.waset.org/abstracts/search?q=methacrylic%20nanoparticles" title=" methacrylic nanoparticles"> methacrylic nanoparticles</a> </p> <a href="https://publications.waset.org/abstracts/98085/preparation-of-biodegradable-methacrylic-nanoparticles-by-semicontinuous-heterophase-polymerization-for-drugs-loading-the-case-of-acetylsalicylic-acid" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/98085.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">140</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1959</span> Photopolymerization of Dimethacrylamide with (Meth)acrylates</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yuling%20Xu">Yuling Xu</a>, <a href="https://publications.waset.org/abstracts/search?q=Haibo%20Wang"> Haibo Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Dong%20Xie"> Dong Xie</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A photopolymerizable dimethacrylamide was synthesized and copolymerized with the selected (meth)acrylates. The polymerization rate, degree of conversion, gel time, and compressive strength of the formed neat resins were investigated. The results show that in situ photo-polymerization of the synthesized dimethacrylamide with comonomers having an electron-withdrawing and/or acrylate group dramatically increased the polymerization rate, degree of conversion, and compressive strength. On the other hand, an electron-donating group on either carbon-carbon double bond or the ester linkage slowed down the polymerization. In contrast, the triethylene glycol dimethacrylate-based system did not show a clear pattern. Both strong hydrogen-bonding between (meth)acrylamide and organic acid groups may be responsible for higher compressive strengths. Within the limitation of this study, the photo-polymerization of dimethacrylamide can be greatly accelerated by copolymerization with monomers having electron-withdrawing and/or acrylate groups. The monomers with methacrylate group can significantly reduce the polymerization rate and degree of conversion. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=photopolymerization" title="photopolymerization">photopolymerization</a>, <a href="https://publications.waset.org/abstracts/search?q=dimethacrylamide" title=" dimethacrylamide"> dimethacrylamide</a>, <a href="https://publications.waset.org/abstracts/search?q=the%20degree%20of%20conversion" title=" the degree of conversion"> the degree of conversion</a>, <a href="https://publications.waset.org/abstracts/search?q=compressive%20strength" title=" compressive strength"> compressive strength</a> </p> <a href="https://publications.waset.org/abstracts/93577/photopolymerization-of-dimethacrylamide-with-methacrylates" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/93577.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">156</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1958</span> High Toughening Effects of Polybenzoxazine Filled with Ultrafine Fully Vulcanized Powder Natural Rubber Grafted with Varied Monomers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Pattulee">A. Pattulee</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20Lawan"> I. Lawan</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Boonnao"> N. Boonnao</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Gholami"> R. Gholami</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20Rimdusit"> P. Rimdusit</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Rimdusit"> S. Rimdusit</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Varied types and content of ultrafine vulcanized powdered natural rubbers (UFPNR) as toughening fillers of polybenzoxazine composite are investigated in this work. Four types of UFPNR were prepared by graft polymerization of acrylonitrile monomer (AN), styrene monomer (ST), styrene-acrylonitrile copolymer (ST/AN), and styrene-methyl methacrylate copolymer (ST/MMA) onto deproteinized natural rubber (DPNR). The solid UFPNR powders with different types of grafting were finally obtained by electron beam vulcanization and a spray-drying technique. Additionally, effects of various UFPNR contents (0, 5, 10, 15, 20, and 25 wt%) on toughness of polybenzoxazine composites were studied. It was observed that the UFPNR grafted with the styrene-methyl methacrylate copolymer (UFPNR-g-(PS-co-PMMA)) exhibited the most effective toughening agent for polybenzoxazine, whereas the rubber powder content of 25 wt% was found to be the optimal filler loading in enhancing the toughness of the resulting composite. The experimental results revealed an increase of 86% in toughness and 56% in impact strength at the above UFPNR-g- (PS-co-PMMA powdered rubber content. Interestingly, the utilization of the UFPNR-g-(PS-co-PMMA as toughening agent was found to increase thermal stability (degradation temperature at 5wt.% (Td5) and glass transition temperature (Tg) of the composite i.e. an increase of 8°C and 6 °C has been observed for the Td5 and Tg, respectively. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=natural%20rubber" title="natural rubber">natural rubber</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrafine%20fully%20vulcanized%20powder%20rubber" title=" ultrafine fully vulcanized powder rubber"> ultrafine fully vulcanized powder rubber</a>, <a href="https://publications.waset.org/abstracts/search?q=polybenzoxazine" title=" polybenzoxazine"> polybenzoxazine</a>, <a href="https://publications.waset.org/abstracts/search?q=polymer%20composite" title=" polymer composite"> polymer composite</a>, <a href="https://publications.waset.org/abstracts/search?q=toughening" title=" toughening"> toughening</a> </p> <a href="https://publications.waset.org/abstracts/194528/high-toughening-effects-of-polybenzoxazine-filled-with-ultrafine-fully-vulcanized-powder-natural-rubber-grafted-with-varied-monomers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/194528.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">7</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1957</span> Clinical Effectiveness of Bulk-fill Resin Composite: A Review</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Taraneh%20Estedlal">Taraneh Estedlal</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The objective of this study was to review in-vivo and in-vitro studies to compare the effectiveness of bulk-fill and conventional resin composites with regard to marginal adaptation, polymerization shrinkage, and other mechanical properties.PubMed and Scopus databases was investigated for in-vitro studies and randomized clinical trials comparing incidence of fractures, color stability, marginal adaptation, pain and discomfort, recurrent caries, occlusion, pulpal reaction, and proper proximal contacts of restorations made with conventional and bulk resins. The failure rate of conventional and flowable bulk-fill resin composites was not significantly different to sculptable bulk-fill resin composites. The objective of this study was to review in-vivo and in-vitro studies to compare the effectiveness of bulk-fill and conventional resin composites with regard to marginal adaptation, polymerization shrinkage, and other mechanical properties. PubMed and Scopus databases was investigated for in-vitro studies and randomized clinical trials comparing one of the pearlier mentioned properties between bulk-fill and control composites. Despite differences in physical and in-vitro properties, failure rate of conventional and flowable bulk-fill resin composites was not significantly different to sculptable bulk-fill resin composites. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=polymerization%20shrinkage" title="polymerization shrinkage">polymerization shrinkage</a>, <a href="https://publications.waset.org/abstracts/search?q=color%20stability" title=" color stability"> color stability</a>, <a href="https://publications.waset.org/abstracts/search?q=marginal%20adaptation" title=" marginal adaptation"> marginal adaptation</a>, <a href="https://publications.waset.org/abstracts/search?q=recurrent%20caries" title=" recurrent caries"> recurrent caries</a>, <a href="https://publications.waset.org/abstracts/search?q=occlusion" title=" occlusion"> occlusion</a>, <a href="https://publications.waset.org/abstracts/search?q=pulpal%20reaction" title=" pulpal reaction"> pulpal reaction</a> </p> <a href="https://publications.waset.org/abstracts/144282/clinical-effectiveness-of-bulk-fill-resin-composite-a-review" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/144282.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">145</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1956</span> Aggregation-Induced-Active Stimuli-Responsive Based Nano-Objects for Wastewater Treatment Application</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Parvaneh%20Eskandari">Parvaneh Eskandari</a>, <a href="https://publications.waset.org/abstracts/search?q=Rachel%20O%27Reilly"> Rachel O'Reilly</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the last years, controlling the self-assembly behavior of stimuli-responsive nano-objects, including micelles, vesicles, worm-like, etc., at different conditions is considered a pertinent challenge in the polymer community. The aim of the project was to synthesize aggregation-induced emission (AIE)-active stimuli-responsive polymeric nano-objects to control the self-assemblies morphologies of the prepared nano-objects. Two types of nanoobjects, micelle and vesicles, including PDMAEMA-b-P(BzMA-TPEMA) [PDMAEMA: poly(N,Ndimethylaminoethyl methacrylate); P(BzMA-TPEMA): poly[benzyl methacrylate-co- tetraphenylethene methacrylate]] were synthesized by using reversible addition−fragmentation chain-transfer (RAFT)- mediated polymerization-induced self-assembly (PISA), which combines polymerization and self-assembly in a single step. Transmission electron microscope and dynamic light scattering (DLS) analysis were used to confirm the formed self-assemblies morphologies. The controlled self-assemblies were applied as nitrophenolic compounds (NPCs) adsorbents from wastewater, thanks to their CO2-responsive part, PDMAEMA. Moreover, the fluorescence-active part of the prepared nano-objects, P(BzMA-TPEMA), played a key role in the detection of the NPCs at the aqueous solution. The optical properties of the prepared nano-objects were studied by UV/Vis and fluorescence spectroscopies. For responsivity investigations, the hydrodynamic diameter and Zeta-potential (ζ-potential) of the sample's aqueous solution were measured by DLS. In the end, the prepared nano-objects were used for the detection and adsorption of different NPCs. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aggregation-induced%20emission%20polymers" title="aggregation-induced emission polymers">aggregation-induced emission polymers</a>, <a href="https://publications.waset.org/abstracts/search?q=stimuli-responsive%20polymers" title=" stimuli-responsive polymers"> stimuli-responsive polymers</a>, <a href="https://publications.waset.org/abstracts/search?q=reversible%20addition%E2%88%92fragmentation%20chain-transfer%20polymerization" title=" reversible addition−fragmentation chain-transfer polymerization"> reversible addition−fragmentation chain-transfer polymerization</a>, <a href="https://publications.waset.org/abstracts/search?q=polymerization-induced%20self-assembly" title=" polymerization-induced self-assembly"> polymerization-induced self-assembly</a>, <a href="https://publications.waset.org/abstracts/search?q=wastewater%20treatment" title=" wastewater treatment"> wastewater treatment</a> </p> <a href="https://publications.waset.org/abstracts/172871/aggregation-induced-active-stimuli-responsive-based-nano-objects-for-wastewater-treatment-application" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/172871.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">73</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1955</span> Characterization of Poly(Hydroxyethyl Methacrylate-Glycidyl Methacrylate)-Imino Diacetic Acid Membrane to Adsorbing Leather Dye</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmet%20Aslan">Ahmet Aslan</a>, <a href="https://publications.waset.org/abstracts/search?q=Safiye%20Meric%20Acikel"> Safiye Meric Acikel</a>, <a href="https://publications.waset.org/abstracts/search?q=Raziye%20Hilal%20Senay"> Raziye Hilal Senay</a>, <a href="https://publications.waset.org/abstracts/search?q=Sinan%20Akgol"> Sinan Akgol</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Different chemical substances and too much water are used during leather production. Therefore, the waste water load of the leather industry is harmful to the environment. One of the pollution sources is the production of leather coloring process is a further need to focus on the removal of dye waste waters subject. These water-soluble dyes have a small organic molecular size. Besides the environmental hazards, these dyes cannot be underestimated, they also have harmful effects on human health. In this study, poly(hydroxyethyl methacrylate-glycidyl methacrylate) p(HEMA-GMA) hydrogel membranes were synthesized by UV polymerization method. The hydrogel synthesized is modified with imino diacetic acid (IDA) and then chelated with Cr (III) ions. The chelating capacity of the membranes was determined according to the time, pH and concentration parameters. Dynamic swelling test, elemental analysis, ninhydrin analysis and adsorption, desorption and reusability performances of membranes were also determined. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=adsorption" title="adsorption">adsorption</a>, <a href="https://publications.waset.org/abstracts/search?q=dye" title=" dye"> dye</a>, <a href="https://publications.waset.org/abstracts/search?q=leather" title=" leather"> leather</a>, <a href="https://publications.waset.org/abstracts/search?q=p%28HEMA-GMA%29-IDA" title=" p(HEMA-GMA)-IDA"> p(HEMA-GMA)-IDA</a> </p> <a href="https://publications.waset.org/abstracts/80973/characterization-of-polyhydroxyethyl-methacrylate-glycidyl-methacrylate-imino-diacetic-acid-membrane-to-adsorbing-leather-dye" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/80973.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">181</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1954</span> End To End Process to Automate Batch Application</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nagmani%20Lnu">Nagmani Lnu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Often, Quality Engineering refers to testing the applications that either have a User Interface (UI) or an Application Programming Interface (API). We often find mature test practices, standards, and automation regarding UI or API testing. However, another kind is present in almost all types of industries that deal with data in bulk and often get handled through something called a Batch Application. This is primarily an offline application companies develop to process large data sets that often deal with multiple business rules. The challenge gets more prominent when we try to automate batch testing. This paper describes the approaches taken to test a Batch application from a Financial Industry to test the payment settlement process (a critical use case in all kinds of FinTech companies), resulting in 100% test automation in Test Creation and Test execution. One can follow this approach for any other batch use cases to achieve a higher efficiency in their testing process. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=batch%20testing" title="batch testing">batch testing</a>, <a href="https://publications.waset.org/abstracts/search?q=batch%20test%20automation" title=" batch test automation"> batch test automation</a>, <a href="https://publications.waset.org/abstracts/search?q=batch%20test%20strategy" title=" batch test strategy"> batch test strategy</a>, <a href="https://publications.waset.org/abstracts/search?q=payments%20testing" title=" payments testing"> payments testing</a>, <a href="https://publications.waset.org/abstracts/search?q=payments%20settlement%20testing" title=" payments settlement testing"> payments settlement testing</a> </p> <a href="https://publications.waset.org/abstracts/181653/end-to-end-process-to-automate-batch-application" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/181653.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">60</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1953</span> Developing a Self-Healing Concrete Filler Using Poly(Methyl Methacrylate) Based Two-Part Adhesive</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Shima%20Taheri">Shima Taheri</a>, <a href="https://publications.waset.org/abstracts/search?q=Simon%20Clark"> Simon Clark </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Concrete is an essential building material used in the majority of structures. Degradation of concrete over time increases the life-cycle cost of an asset with an estimated annual cost of billions of dollars to national economies. Most of the concrete failure occurs due to cracks, which propagate through a structure and cause weakening leading to failure. Stopping crack propagation is thus the key to protecting concrete structures from failure and is the best way to prevent inconveniences and catastrophes. Furthermore, the majority of cracks occur deep within the concrete in inaccessible areas and are invisible to normal inspection. Few materials intrinsically possess self-healing ability, but one that does is concrete. However, self-healing in concrete is limited to small dormant cracks in a moist environment and is difficult to control. In this project, we developed a method for self-healing of nascent fractures in concrete components through the automatic release of self-curing healing agents encapsulated in breakable nano- and micro-structures. The Poly(methyl methacrylate) (PMMA) based two-part adhesive is encapsulated in core-shell structures with brittle/weak inert shell, synthesized via miniemulsion/solvent evaporation polymerization. Stress fields associated with propagating cracks can break these capsules releasing the healing agents at the point where they are needed. The shell thickness is playing an important role in preserving the content until the final setting of concrete. The capsules can also be surface functionalized with carboxyl groups to overcome the homogenous mixing issues. Currently, this formulated self-healing system can replace up to 1% of cement in a concrete formulation. Increasing this amount to 5-7% in the concrete formulation without compromising compression strength and shrinkage properties, is still under investigation. This self-healing system will not only increase the durability of structures by stopping crack propagation but also allow the use of less cement in concrete construction, thereby adding to the global effort for CO2 emission reduction. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=self-healing%20concrete" title="self-healing concrete">self-healing concrete</a>, <a href="https://publications.waset.org/abstracts/search?q=concrete%20crack" title=" concrete crack"> concrete crack</a>, <a href="https://publications.waset.org/abstracts/search?q=concrete%20deterioration" title=" concrete deterioration"> concrete deterioration</a>, <a href="https://publications.waset.org/abstracts/search?q=durability" title=" durability"> durability</a> </p> <a href="https://publications.waset.org/abstracts/107110/developing-a-self-healing-concrete-filler-using-polymethyl-methacrylate-based-two-part-adhesive" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/107110.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">118</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1952</span> Poly (Acrylonitrile-Co-Methylacrylate)/Poly N-Methyl Pyrrole and Pyrrole Nanocomposites</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fatma%20Zehra%20Engin%20Sagirli">Fatma Zehra Engin Sagirli</a>, <a href="https://publications.waset.org/abstracts/search?q=Eyup%20Sabri%20Kayali"> Eyup Sabri Kayali</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Sezai%20Sarac"> A. Sezai Sarac</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, Poly (acrylonitrile-co-methylacrylate)/N-Methyl Pyrrole and Pyrrole ([P(AN-co-MA)]-NMPy and [P(AN-co-MA)]-PPy) core–shell nanoparticles were obtained by in situ emulsion polymerization in the presence of Sodium dodecyl benzene sulfonate and sodium dodecyl sulfate (SDBS and SDS) by using ammonium per sulphate in the aqueous medium. The spectroscopic characterizations during the formation of nanocomposites were studied using Attenuated total reflectance Fourier transform infrared (FTIR-ATR) spectroscopy, ultraviolet–visible spectrophotometer (Uv-Vis). Electrical conductivity of the emulsion solution was measured by Conductivity Meter from aqueous sample solution. Also, yield of the powder nanocomposites was measured. SDBS and SDS used for investigation of surfactant effect on yield, electrical conductivity and polymerization process. Determination of polymerization yield, (FTIR-ATR) and (Uv-Vis) prove that the SDBS surfactant become more incorporated into the conducting polymers and there is strong interaction between the [P(AN-co-MA)]-PPy derivatives which prepared by these surfactants. The similar inclusion of SDS into conducting polymers was not observed, there is a remarkable difference at nanocomposites which prepared with SDS. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanocomposites" title="nanocomposites">nanocomposites</a>, <a href="https://publications.waset.org/abstracts/search?q=core-shell" title=" core-shell"> core-shell</a>, <a href="https://publications.waset.org/abstracts/search?q=pyrole" title=" pyrole"> pyrole</a>, <a href="https://publications.waset.org/abstracts/search?q=surfactant" title=" surfactant"> surfactant</a> </p> <a href="https://publications.waset.org/abstracts/56074/poly-acrylonitrile-co-methylacrylatepoly-n-methyl-pyrrole-and-pyrrole-nanocomposites" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/56074.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">403</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1951</span> From Homogeneous to Phase Separated UV-Cured Interpenetrating Polymer Networks: Influence of the System Composition on Properties and Microstructure</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Caroline%20Rocco">Caroline Rocco</a>, <a href="https://publications.waset.org/abstracts/search?q=Feyza%20Karasu"> Feyza Karasu</a>, <a href="https://publications.waset.org/abstracts/search?q=C%C3%A9line%20Croutx%C3%A9-Barghorn"> Céline Croutxé-Barghorn</a>, <a href="https://publications.waset.org/abstracts/search?q=Xavier%20Allonas"> Xavier Allonas</a>, <a href="https://publications.waset.org/abstracts/search?q=Maxime%20Lecomp%C3%A8re"> Maxime Lecompère</a>, <a href="https://publications.waset.org/abstracts/search?q=G%C3%A9rard%20Riess"> Gérard Riess</a>, <a href="https://publications.waset.org/abstracts/search?q=Yujing%20Zhang"> Yujing Zhang</a>, <a href="https://publications.waset.org/abstracts/search?q=Catarina%20Esteves"> Catarina Esteves</a>, <a href="https://publications.waset.org/abstracts/search?q=Leendert%20van%20der%20Ven"> Leendert van der Ven</a>, <a href="https://publications.waset.org/abstracts/search?q=Rolf%20van%20Benthem%20Gijsbertus%20de%20With"> Rolf van Benthem Gijsbertus de With</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Acrylates are widely used in UV-curing technology. Their high reactivity can, however, limit their conversion due to early vitrification. In addition, the free radical photopolymerization is known to be sensitive to oxygen inhibition leading to tacky surfaces. Although epoxides can lead to full polymerization, they are sensitive to humidity and exhibit low polymerization rate. To overcome the intrinsic limitations of both classes of monomers, Interpenetrating Polymer Networks (IPNs) can be synthesized. They consist of at least two cross linked polymers which are permanently entangled. They can be achieved under thermal and/or light induced polymerization in one or two steps approach. IPNs can display homogeneous to heterogeneous morphologies with various degrees of phase separation strongly linked to the monomer miscibility and also synthesis parameters. In this presentation, we synthesize UV-cured methacrylate - epoxide based IPNs with different chemical compositions in order to get a better understanding of their formation and phase separation. Miscibility before and during the photopolymerization, reaction kinetics, as well as mechanical properties and morphology have been investigated. The key parameters controlling the morphology and the phase separation, namely monomer miscibility and synthesis parameters have been identified. By monitoring the stiffness changes on the film surface, atomic force acoustic microscopy (AFAM) gave, in conjunction with polymerization kinetic profiles and thermomechanical properties, explanations and corroborated the miscibility predictions. When varying the methacrylate / epoxide ratio, it was possible to move from a miscible and highly-interpenetrated IPN to a totally immiscible and phase-separated one. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=investigation%20of%20properties%20and%20morphology" title="investigation of properties and morphology">investigation of properties and morphology</a>, <a href="https://publications.waset.org/abstracts/search?q=kinetics" title=" kinetics"> kinetics</a>, <a href="https://publications.waset.org/abstracts/search?q=phase%20separation" title=" phase separation"> phase separation</a>, <a href="https://publications.waset.org/abstracts/search?q=UV-cured%20IPNs" title=" UV-cured IPNs"> UV-cured IPNs</a> </p> <a href="https://publications.waset.org/abstracts/27489/from-homogeneous-to-phase-separated-uv-cured-interpenetrating-polymer-networks-influence-of-the-system-composition-on-properties-and-microstructure" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/27489.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">367</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1950</span> Bulk Amounts of Linear and Cyclic Polypeptides on Our Hand within a Short Time</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yu%20Zhang">Yu Zhang</a>, <a href="https://publications.waset.org/abstracts/search?q=Il%20Kim"> Il Kim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Polypeptides with defined peptide sequences illustrate the power of remarkable applications in drug delivery, tissue engineering, sensing and catalysis. Especially the cyclic polypeptides, the distinctive topological architecture imparts many characteristic properties comparing to linear polypeptides. Here, a facile and highly efficient strategy for the synthesis of linear and cyclic polypeptides is reported using N-heterocyclic carbenes (NHCs)-mediated ring-opening polymerization (ROP) of α-amino acid N-carboxyanhydrides (NCA) in the presence or absence of primary amine initiator. The polymerization proceeds rapidly in a quasi-living manner, allowing access to linear and cyclic polypeptides of well-defined chain length and narrow polydispersity, as evidenced by nuclear magnetic resonance spectrum (1H NMR and 13C NMR spectra) and size exclusion chromatography (SEC) analysis. The cyclic architecture of the polypeptides was further verified by matrix-assisted laser desorption ionization-time of flight (MALDI-TOF) mass spectra (MALDI-TOF MS) and electrospray ionization (ESI) mass spectra, as well as viscosity studies. This approach can also simplify workup procedures and make bulk scale synthesis possible, which thereby opens avenues for practical uses in diverse areas, opening up the new generation of polypeptide synthesis. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=%CE%B1-amino%20acid%20N-carboxyanhydrides" title="α-amino acid N-carboxyanhydrides">α-amino acid N-carboxyanhydrides</a>, <a href="https://publications.waset.org/abstracts/search?q=living%20polymerization" title=" living polymerization"> living polymerization</a>, <a href="https://publications.waset.org/abstracts/search?q=polypeptides" title=" polypeptides"> polypeptides</a>, <a href="https://publications.waset.org/abstracts/search?q=N-heterocyclic%20carbenes" title=" N-heterocyclic carbenes"> N-heterocyclic carbenes</a>, <a href="https://publications.waset.org/abstracts/search?q=ring-opening%20polymerization" title=" ring-opening polymerization"> ring-opening polymerization</a> </p> <a href="https://publications.waset.org/abstracts/75665/bulk-amounts-of-linear-and-cyclic-polypeptides-on-our-hand-within-a-short-time" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/75665.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">167</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1949</span> Nonlinear Adaptive PID Control for a Semi-Batch Reactor Based on an RBF Network</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Magdi.%20M.%20Nabi">Magdi. M. Nabi</a>, <a href="https://publications.waset.org/abstracts/search?q=Ding-Li%20Yu"> Ding-Li Yu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Control of a semi-batch polymerization reactor using an adaptive radial basis function (RBF) neural network method is investigated in this paper. A neural network inverse model is used to estimate the valve position of the reactor; this method can identify the controlled system with the RBF neural network identifier. The weights of the adaptive PID controller are timely adjusted based on the identification of the plant and self-learning capability of RBFNN. A PID controller is used in the feedback control to regulate the actual temperature by compensating the neural network inverse model output. Simulation results show that the proposed control has strong adaptability, robustness and satisfactory control performance and the nonlinear system is achieved. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chylla-Haase%20polymerization%20reactor" title="Chylla-Haase polymerization reactor">Chylla-Haase polymerization reactor</a>, <a href="https://publications.waset.org/abstracts/search?q=RBF%20neural%20networks" title=" RBF neural networks"> RBF neural networks</a>, <a href="https://publications.waset.org/abstracts/search?q=feed-forward" title=" feed-forward"> feed-forward</a>, <a href="https://publications.waset.org/abstracts/search?q=feedback%20control" title=" feedback control"> feedback control</a> </p> <a href="https://publications.waset.org/abstracts/11204/nonlinear-adaptive-pid-control-for-a-semi-batch-reactor-based-on-an-rbf-network" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11204.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">702</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1948</span> Utilization Reactive Dilutes to Improve the Properties of Epoxy Resin as Anticorrosion Coating</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=El-Sayed%20Negim">El-Sayed Negim</a>, <a href="https://publications.waset.org/abstracts/search?q=Ainakulova%20D.%20T."> Ainakulova D. T.</a>, <a href="https://publications.waset.org/abstracts/search?q=Puteri%20S.%20M."> Puteri S. M.</a>, <a href="https://publications.waset.org/abstracts/search?q=Khaldun%20M.%20Azzam"> Khaldun M. Azzam</a>, <a href="https://publications.waset.org/abstracts/search?q=Bekbayeva%20L.%20K."> Bekbayeva L. K.</a>, <a href="https://publications.waset.org/abstracts/search?q=Arpit%20Goyal"> Arpit Goyal</a>, <a href="https://publications.waset.org/abstracts/search?q=Ganjian%20E."> Ganjian E.</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Anticorrosion coatings protect metal surfaces from environmental factors including moisture, oxygen, and gases that caused corrosion to the metal. Various types of anticorrosion coatings are available, with different properties and application methods. Many researchers have been developing methods to prevent corrosion, and epoxy polymers are one of the wide methods due to their excellent adhesion, chemical resistance, and durability. In this study, synthesis reactive dilute based on glycidyl methacrylate (GMA) with each of 2-ethylhexyl acrylate (2-EHA) and butyl acrylate (BuA) to improve the performance of epoxy resin and anticorrosion coating. The copolymers were synthesized with composition ratio (5/5) by bulk polymerization technique using benzoyl peroxide as a catalyst and temperature at 85 oC for 2 hours and at 90 oC for 30 minutes to complete the polymerization process. The obtained copolymers were characterized by FTIR, viscosity and thixotropic index. The effect of copolymers as reactive dilute on the physical and mechanical properties of epoxy resin was investigated. Metal plates coated by the modified epoxy resins with different contents of copolymers were tested using alkali and salt test methods, and the copolymer based on GMA and BUA showed the best protection efficiency due to the barrier effect of the polymer layer. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=epoxy" title="epoxy">epoxy</a>, <a href="https://publications.waset.org/abstracts/search?q=coating" title=" coating"> coating</a>, <a href="https://publications.waset.org/abstracts/search?q=dilute" title=" dilute"> dilute</a>, <a href="https://publications.waset.org/abstracts/search?q=corrosion" title=" corrosion"> corrosion</a>, <a href="https://publications.waset.org/abstracts/search?q=reactive" title=" reactive"> reactive</a> </p> <a href="https://publications.waset.org/abstracts/185920/utilization-reactive-dilutes-to-improve-the-properties-of-epoxy-resin-as-anticorrosion-coating" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/185920.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">52</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1947</span> Rheological and Morphological Properties of Investment Casting Pattern Material Based on Paraffin Wax Fortified with Linear Low-Density Polyethylene and Filled with Poly Methyl Methacrylate</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Robert%20Kimutai%20Tewo">Robert Kimutai Tewo</a>, <a href="https://publications.waset.org/abstracts/search?q=Hilary%20Limo%20Rutto"> Hilary Limo Rutto</a>, <a href="https://publications.waset.org/abstracts/search?q=Tumisang%20Seodigeng"> Tumisang Seodigeng</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The rheological and morphological properties of paraffin wax, linear low-density polyethylene (LLDPE), and poly (methyl methacrylate) (PMMA) microbeads formulations were prepared via an extrusion process. The blends were characterized by rheometry, scanning electron microscopy (SEM), and Fourier transform infrared (FTIR) spectroscopy. The results indicated that the viscosity of the blends increased as compared to that of neat wax. SEM confirmed that LLDPE alters the wax crystal habit at higher concentrations. The rheological experimental data fitted with predicted data using the modified Krieger and Dougherty expression. The SEM micrograph of wax/LLDPE/PMMA revealed a near-perfect spherical nature for the filler particles in the wax/EVA polymer matrix. The FT-IR spectra show the deformation vibrations stretch of a long-chain aliphatic hydrocarbon (C-H) and also the presence of carbonyls absorption group denoted by -C=O- stretch. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=investment%20casting%20pattern" title="investment casting pattern">investment casting pattern</a>, <a href="https://publications.waset.org/abstracts/search?q=paraffin%20wax" title=" paraffin wax"> paraffin wax</a>, <a href="https://publications.waset.org/abstracts/search?q=LLDPE" title=" LLDPE"> LLDPE</a>, <a href="https://publications.waset.org/abstracts/search?q=PMMA" title=" PMMA"> PMMA</a>, <a href="https://publications.waset.org/abstracts/search?q=rheological%20properties" title=" rheological properties"> rheological properties</a>, <a href="https://publications.waset.org/abstracts/search?q=modified%20Krieger%20and%20Dougherty%20expression" title=" modified Krieger and Dougherty expression"> modified Krieger and Dougherty expression</a> </p> <a href="https://publications.waset.org/abstracts/116320/rheological-and-morphological-properties-of-investment-casting-pattern-material-based-on-paraffin-wax-fortified-with-linear-low-density-polyethylene-and-filled-with-poly-methyl-methacrylate" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/116320.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">170</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1946</span> Stimuli Responsives of Crosslinked Poly on 2-HydroxyEthyl MethAcrylate – Optimization of Parameters by Experimental Design</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tewfik%20Bouchaour">Tewfik Bouchaour</a>, <a href="https://publications.waset.org/abstracts/search?q=Salah%20Hamri"> Salah Hamri</a>, <a href="https://publications.waset.org/abstracts/search?q=Yasmina%20Houda%20Bendahma"> Yasmina Houda Bendahma</a>, <a href="https://publications.waset.org/abstracts/search?q=Ulrich%20Maschke"> Ulrich Maschke</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Stimuli-responsive materials based on UV crosslinked acrylic polymer networks are fabricated. A various kinds of polymeric systems, hydrophilic polymers based on 2-Hydroxyethyl methacrylate have been widely studied because of their ability to simulate biological tissues, which leads to many applications. The acrylic polymer network PHEMA developed by UV photopolymerization has been used for dye retention. For these so-called smart materials, the properties change in response to an external stimulus. In this contribution, we report the influence of some parameters (initial composition, temperature, and nature of components) in the properties of final materials. Optimization of different parameters is examined by experimental design. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=UV%20photo-polymerization" title="UV photo-polymerization">UV photo-polymerization</a>, <a href="https://publications.waset.org/abstracts/search?q=PHEMA" title=" PHEMA"> PHEMA</a>, <a href="https://publications.waset.org/abstracts/search?q=external%20stimulus" title=" external stimulus"> external stimulus</a>, <a href="https://publications.waset.org/abstracts/search?q=optimization" title=" optimization"> optimization</a> </p> <a href="https://publications.waset.org/abstracts/46734/stimuli-responsives-of-crosslinked-poly-on-2-hydroxyethyl-methacrylate-optimization-of-parameters-by-experimental-design" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/46734.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">255</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1945</span> Swelling Behavior of Cross-Linked Poly (2-hydroxyethyl methacrylate)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Salah%20Hamri">Salah Hamri</a>, <a href="https://publications.waset.org/abstracts/search?q=Tewfik%20Bouchaour"> Tewfik Bouchaour</a>, <a href="https://publications.waset.org/abstracts/search?q=Ulrich%20Maschke"> Ulrich Maschke</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of this works is the study of swelling ratio of cross-linked polymer networks poly (2-hydroxyethyl methacrylate) (PHEMA). The system composed of erythrosine and Triethanolamine, in aqueous medium, is used as photo-initiator and 1,6-Hexanediol diacrylate as cross-linker. The analysis of UV-visible and infrared spectra, which were taken at different times during polymerization/cross linking, makes it possible to obtain useful information on the reaction mechanism. The swelling behavior was study by changing the nature of solvent, dye sensitizer (erythrosine, rose Bengal and eosin), and pH of the medium. The exploitation of experimental results using Fick diffusion model is also expected and shows a good correlation between theoretical and experimental results. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cross-linker" title="cross-linker">cross-linker</a>, <a href="https://publications.waset.org/abstracts/search?q=photo-sensitizer" title=" photo-sensitizer"> photo-sensitizer</a>, <a href="https://publications.waset.org/abstracts/search?q=polymer%20network" title=" polymer network"> polymer network</a>, <a href="https://publications.waset.org/abstracts/search?q=swelling%20ratio" title=" swelling ratio"> swelling ratio</a> </p> <a href="https://publications.waset.org/abstracts/29880/swelling-behavior-of-cross-linked-poly-2-hydroxyethyl-methacrylate" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/29880.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">316</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1944</span> Enhancement in Bactericidal Activity of Hydantoin Based Microsphere from Smooth to Rough</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rajani%20Kant%20Rai">Rajani Kant Rai</a>, <a href="https://publications.waset.org/abstracts/search?q=Jayakrishnan%20Athipet"> Jayakrishnan Athipet</a> </p> <p class="card-text"><strong>Abstract:</strong></p> There have been several attempts to prepare polymers with antimicrobial properties by doping with various N-halamines. Hydantoins (Cyclic N-halamine) is of importance due to their stability rechargeable chloroamide function, broad-spectrum anti-microbial action and ability to prevent resistance to the organisms. Polymerizable hydantoins are synthesized by tethering vinyl moieties to 5,5,-dialkyl hydantoin sacrificing the imide hydrogen in the molecule thereby restricting the halogen capture only to the amide nitrogen that results in compromised antibacterial activity. In order to increase the activity of the antimicrobial polymer, we have developed a scheme to maximize the attachment of chlorine to the amide and the imide moieties of hydantoin. Vinyl hydantoin monomer, (Z)-5-(4-((3-methylbuta-1,3-dien-2-yl)oxy)benzylidene)imidazolidine-2,4-dione (MBBID) was synthesized and copolymerized with a commercially available monomer, methyl methacrylate, by free radical polymerization. The antimicrobial activity of hydantoin is strongly dependent on their surface area and hence their microbial activity increases when incorporated in microspheres or nanoparticles as compared to their bulk counterpart. In this regard, smooth and rough surface microsphere of the vinyl monomer (MBBID) with commercial monomer was synthesized. The oxidative chlorine content of the copolymer ranged from 1.5 to 2.45 %. Further, to demonstrate the water purification potential, the thin column was packed with smooth or rough microspheres and challenged with simulated contaminated water that exhibited 6 log kill (total kill) of the bacteria in 20 minutes of exposure with smooth (25 mg/ml) and rough microsphere (15.0 mg/ml). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cyclic%20N-halamine" title="cyclic N-halamine">cyclic N-halamine</a>, <a href="https://publications.waset.org/abstracts/search?q=vinyl%20hydantoin%20monomer" title=" vinyl hydantoin monomer"> vinyl hydantoin monomer</a>, <a href="https://publications.waset.org/abstracts/search?q=rough%20surface%20microsphere" title=" rough surface microsphere"> rough surface microsphere</a>, <a href="https://publications.waset.org/abstracts/search?q=simulated%20contaminated%20water" title=" simulated contaminated water"> simulated contaminated water</a> </p> <a href="https://publications.waset.org/abstracts/96510/enhancement-in-bactericidal-activity-of-hydantoin-based-microsphere-from-smooth-to-rough" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/96510.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">145</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1943</span> Organic Co-Polymer Monolithic Columns for Liquid Chromatography Mixed Mode Protein Separations</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Alkarimi">Ahmed Alkarimi</a>, <a href="https://publications.waset.org/abstracts/search?q=Kevin%20Welham"> Kevin Welham</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Organic mixed mode monolithic columns were fabricated from; glycidyl methacrylate-co-ethylene dimethacrylate-co-stearyl methacrylate, using glycidyl methacrylate and stearyl methacrylate as co monomers representing 30% and 70% respectively of the liquid volume with ethylene dimethacrylate crosslinker and 2,2-dimethoxy-2-phenylacetophenone as the free radical initiator. The monomers were mixed with a binary porogenic solvent, comprising propan-1-ol, and methanol (0.825 mL each). The monolith was formed by photo polymerization (365 nm) inside a borosilicate glass tube (1.5 mm ID and 3 mm OD x 50 mm length). The monolith was observed to have formed correctly by optical examination and generated reasonable backpressure, approximately 650 psi at a flow rate of 0.2 mL min⁻¹ 50:50 acetonitrile: water. The morphological properties of the monolithic columns were investigated using scanning electron microscopy images, and Brunauer-Emmett-Teller analysis, the results showed that the monolith was formed properly with 19.98 ± 0.01 mm² surface area, 0.0205 ± 0.01 cm³ g⁻¹ pore volume and 6.93 ± 0.01 nm average pore size. The polymer monolith formed was further investigated using proton nuclear magnetic resonance, and Fourier transform infrared spectroscopy. The monolithic columns were investigated using high-performance liquid chromatography to test their ability to separate different samples with a range of properties. The columns displayed both hydrophobic/hydrophilic and hydrophobic/ion exchange interactions with the compounds tested indicating that true mixed mode separations. The mixed mode monolithic columns exhibited significant separation of proteins. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=LC%20separation" title="LC separation">LC separation</a>, <a href="https://publications.waset.org/abstracts/search?q=proteins%20separation" title=" proteins separation"> proteins separation</a>, <a href="https://publications.waset.org/abstracts/search?q=monolithic%20column" title=" monolithic column"> monolithic column</a>, <a href="https://publications.waset.org/abstracts/search?q=mixed%20mode" title=" mixed mode"> mixed mode</a> </p> <a href="https://publications.waset.org/abstracts/76321/organic-co-polymer-monolithic-columns-for-liquid-chromatography-mixed-mode-protein-separations" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/76321.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">162</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1942</span> Qusai-Solid-State Electrochromic Device Based on PolyMethyl Methacrylate (PMMA)/Succinonitrile Gel Polymer Electrolyte</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jen-Yuan%20Wang">Jen-Yuan Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Min-Chuan%20Wang"> Min-Chuan Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Der-Jun%20Jan"> Der-Jun Jan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Polymer electrolytes can be classified into four major categories, solid polymer electrolytes (SPEs), gel polymer electrolytes (GPEs), polyelectrolytes and composite polymer electrolytes. SPEs suffer from low ionic conductivity at room temperature. The main problems for GPEs are the poor thermal stability and mechanical properties. In this study, a GPE containing PMMA and succinonitrile is prepared to solve the problems mentioned above, and applied to the assembly of a quasi-solid-state electrochromic device (ECD). In the polymer electrolyte, poly(methyl methacrylate) (PMMA) is the polymer matrix and propylene carbonate (PC) is used as the plasticizer. To enhance the mechanical properties of this GPE, succinonitrile (SN) is introduced as the additive. For the electrochromic materials, tungsten oxide (WO3) is used as the cathodic coloring film, which is fabricated by pulsed dc magnetron reactive sputtering. For the anodic coloring material, Prussian blue nanoparticles (PBNPs) are synthesized and coated on the transparent Sn-doped indium oxide (ITO) glass. The thickness of ITO, WO3 and PB film is 110, 170 and 200 nm, respectively. The size of the ECD is 5×5 cm2. The effect of the introduction of SN into the GPEs is discussed by observing the electrochromic behaviors of the WO3-PB ECD. Besides, the composition ratio of PC to SN is also investigated by measuring the ionic conductivity. The optimized ratio of PC to SN is 4:1, and the ionic conductivity under this condition is 6.34x10-5 S∙cm-1, which is higher than that of PMMA/PC (1.35x10-6 S∙cm-1) and PMMA/EC/PC (4.52x10-6 S∙cm-1). This quasi-solid-state ECD fabricated with the PMMA/SN based GPE shows an optical contrast of ca. 53% at 690 nm. The optical transmittance of the ECD can be reversibly modulated from 72% (bleached) to 19% (darkened), by applying potentials of 1.5 and -2.2 V, respectively. During the durability test, the optical contrast of this ECD remains 44.5% after 2400 cycles, which is 83% of the original one. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electrochromism" title="electrochromism">electrochromism</a>, <a href="https://publications.waset.org/abstracts/search?q=tungsten%20oxide" title=" tungsten oxide"> tungsten oxide</a>, <a href="https://publications.waset.org/abstracts/search?q=prussian%20blue" title=" prussian blue"> prussian blue</a>, <a href="https://publications.waset.org/abstracts/search?q=poly%28methyl%20methacrylate%29" title=" poly(methyl methacrylate)"> poly(methyl methacrylate)</a>, <a href="https://publications.waset.org/abstracts/search?q=succinonitrile" title=" succinonitrile"> succinonitrile</a> </p> <a href="https://publications.waset.org/abstracts/52597/qusai-solid-state-electrochromic-device-based-on-polymethyl-methacrylate-pmmasuccinonitrile-gel-polymer-electrolyte" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/52597.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">297</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1941</span> Synthesis of Microporous Interconnected Polymeric Foam of Poly (Glycidyl Methacrylate-Co-Divinylbenzene-Co-Butyl Acrylate) by Using Aqueous Foam as a Template</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20A.%20Gadgeel">A. A. Gadgeel</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20T.%20Mhaske"> S. T. Mhaske</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hexadecyltrimethylammonium bromide (HTAB) modified nano silica were used as pore stabilizer for the preparation of interconnected macroporous copolymer foam of glycidyl methacrylate (GMA), divinylbenzene (DVB) and tert-butyl acrylate (BA). The polymerization of air infused aqueous foam is carried out through free radical thermal initiator. The porosity of the polymerized foam depends on the concentration of HTAB used to control the hydrophobic and hydrophilic behavior of silica nanoparticle. Modified silica particle results to form closed cell foam with 74% of porosity for 60% of air infusion during aqueous foaming. The preliminary structure of microfoam was observed through optical microscopy, whereas for a better understanding of morphology SEM was used. The proposed route is an eco-friendly route for synthesizing polymeric microporous polymer as compared to other chemical and additive-based routes available. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=air-infused" title="air-infused">air-infused</a>, <a href="https://publications.waset.org/abstracts/search?q=interconnected%20microporous" title=" interconnected microporous"> interconnected microporous</a>, <a href="https://publications.waset.org/abstracts/search?q=porosity" title=" porosity"> porosity</a>, <a href="https://publications.waset.org/abstracts/search?q=aqueous%20foam" title=" aqueous foam"> aqueous foam</a> </p> <a href="https://publications.waset.org/abstracts/104084/synthesis-of-microporous-interconnected-polymeric-foam-of-poly-glycidyl-methacrylate-co-divinylbenzene-co-butyl-acrylate-by-using-aqueous-foam-as-a-template" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/104084.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">120</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1940</span> Comparison of Depth of Cure and Degree of Conversion between Opus Bulk Fill and X-Tra Fill Bulk Fill Composites</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yasaman%20Samani">Yasaman Samani</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20Golmohammadi"> Ali Golmohammadi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Introduction: The degree of conversion and depth of cure affects the clinical success of resin composite restorations directly. One of the main challenges in achieving a successful composite restoration is the achievement of sufficient depth of cure. The insufficient polymerization may lead to a decrease in the physical/mechanical and biological properties of resin composites and, as a result of that, unsuccessful composite restoration. Thus, because of the importance of studying and evaluating the depth of cure and degree of conversion in bulk-fill composites, we decided to evaluate and compare the degree of conversion and depth of cure in two bulk-fill composites; x-tra fill (Voco, Germany) and Opus Bulk fill APS (FGM, Brazil). Materials and Methods: Composite resin specimens (n=10) per group were prepared as cylinder blocks (4×8 mm) with bulk-fill composites, x-tra fil (Voco, Germany) designated as Group A, and Opus Bulk fill APS (FGM, Brazil) designated as Group B. Depth of cure was determined according to “ISO 4049; Depth of Cure” method, In which each specimen were cured (iLED, Woodpecker, China) 40 seconds and FTIR spectroscopy method was used to estimate the degree of conversion of both the bulk-fill composites. The degree of conversion of monomer to polymer was estimated individually in the coronal half (Group A1 and B1) and pulpal half (Group A2 and Group B2) by dividing each specimen into two halves. The data were analyzed using a Student’s t-test and one-way ANOVA at a 5% level of significance. Results: The mean depth of cure in x-tra fil (Voco, Germany) was 3.99 (±0.16), and for Opus Bulk fill, APS (FGM, Brazil) was 2.14 (±0.3). The degree of conversion percentage in Group A1 was 82.7 (±6.1), in group A2 was 73.4 (±5.2), in group B1 was 63.3 (±4.7) and in Group B2 was 56.5 (±7.7). Statistical analysis revealed a significant difference in the depth of cure between the two bulk-fill composites with x-tra fil (Voco, Germany) higher than Opus Bulk fill APS (FGM, Brazil) (P<0.001). The degree of conversion percentage also showed a significant difference, Group A1 being higher than A2 (P=0.0085), B1, and B2 (P<0.001). Group A2 was also higher than B1 (P=0.003) and B2 (P<0.001). There was no significant difference between B1 and B2 (P=0.072). Conclusion: The results indicate that x-tra fill has more depth of cure and a higher percentage of the degree of conversion than Opus Bulk fill APS. The coronal half of x-tra fil had the highest depth of cure percentage (82.66%), and the pulpal half of Opus Bulk fill APS had the lowest percentage (56.45%). Even though both bulk-fill composite materials had an acceptable degree of conversion (55% and higher), x-tra fill has shown better results. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=depth%20of%20cure" title="depth of cure">depth of cure</a>, <a href="https://publications.waset.org/abstracts/search?q=degree%20of%20conversion" title=" degree of conversion"> degree of conversion</a>, <a href="https://publications.waset.org/abstracts/search?q=bulk-fill%20composite" title=" bulk-fill composite"> bulk-fill composite</a>, <a href="https://publications.waset.org/abstracts/search?q=FTIR" title=" FTIR"> FTIR</a> </p> <a href="https://publications.waset.org/abstracts/151692/comparison-of-depth-of-cure-and-degree-of-conversion-between-opus-bulk-fill-and-x-tra-fill-bulk-fill-composites" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/151692.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">102</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1939</span> Nanoparticles Modification by Grafting Strategies for the Development of Hybrid Nanocomposites</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Irati%20Barandiaran">Irati Barandiaran</a>, <a href="https://publications.waset.org/abstracts/search?q=Xabier%20Velasco-Iza"> Xabier Velasco-Iza</a>, <a href="https://publications.waset.org/abstracts/search?q=Galder%20Kortaberria"> Galder Kortaberria</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hybrid inorganic/organic nanostructured materials based on block copolymers are of considerable interest in the field of Nanotechnology, taking into account that these nanocomposites combine the properties of polymer matrix and the unique properties of the added nanoparticles. The use of block copolymers as templates offers the opportunity to control the size and the distribution of inorganic nanoparticles. This research is focused on the surface modification of inorganic nanoparticles to reach a good interface between nanoparticles and polymer matrices which hinders the nanoparticle aggregation. The aim of this work is to obtain a good and selective dispersion of Fe3O4 magnetic nanoparticles into different types of block copolymers such us, poly(styrene-b-methyl methacrylate) (PS-b-PMMA), poly(styrene-b-ε-caprolactone) (PS-b-PCL) poly(isoprene-b-methyl methacrylate) (PI-b-PMMA) or poly(styrene-b-butadiene-b-methyl methacrylate) (SBM) by using different grafting strategies. Fe3O4 magnetic nanoparticles have been surface-modified with polymer or block copolymer brushes following different grafting methods (grafting to, grafting from and grafting through) to achieve a selective location of nanoparticles into desired domains of the block copolymers. Morphology of fabricated hybrid nanocomposites was studied by means of atomic force microscopy (AFM) and with the aim to reach well-ordered nanostructured composites different annealing methods were used. Additionally, nanoparticle amount has been also varied in order to investigate the effect of the nanoparticle content in the morphology of the block copolymer. Nowadays different characterization methods were using in order to investigate magnetic properties of nanometer-scale electronic devices. Particularly, two different techniques have been used with the aim of characterizing synthesized nanocomposites. First, magnetic force microscopy (MFM) was used to investigate qualitatively the magnetic properties taking into account that this technique allows distinguishing magnetic domains on the sample surface. On the other hand, magnetic characterization by vibrating sample magnetometer and superconducting quantum interference device. This technique demonstrated that magnetic properties of nanoparticles have been transferred to the nanocomposites, exhibiting superparamagnetic behavior similar to that of the maghemite nanoparticles at room temperature. Obtained advanced nanostructured materials could found possible applications in the field of dye-sensitized solar cells and electronic nanodevices. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=atomic%20force%20microscopy" title="atomic force microscopy">atomic force microscopy</a>, <a href="https://publications.waset.org/abstracts/search?q=block%20copolymers" title=" block copolymers"> block copolymers</a>, <a href="https://publications.waset.org/abstracts/search?q=grafting%20techniques" title=" grafting techniques"> grafting techniques</a>, <a href="https://publications.waset.org/abstracts/search?q=iron%20oxide%20nanoparticles" title=" iron oxide nanoparticles"> iron oxide nanoparticles</a> </p> <a href="https://publications.waset.org/abstracts/56614/nanoparticles-modification-by-grafting-strategies-for-the-development-of-hybrid-nanocomposites" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/56614.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">262</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1938</span> Synthesis and Characterization of Molecularly Imprinted Polymer as a New Adsorbent for the Removal of Pyridine from Organic Medium</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Opeyemi%20Elujulo">Opeyemi Elujulo</a>, <a href="https://publications.waset.org/abstracts/search?q=Aderonke%20Okoya"> Aderonke Okoya</a>, <a href="https://publications.waset.org/abstracts/search?q=Kehinde%20Awokoya"> Kehinde Awokoya</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Molecularly imprinted polymers (MIP) for the adsorption of pyridine (PYD) was obtained from PYD (the template), styrene (the functional monomer), divinyl benzene (the crosslinker), benzoyl peroxide (the initiator), and water (the porogen). When the template was removed by solvent extraction, imprinted binding sites were left in the polymer material that are capable of selectively rebinding the target molecule. The material was characterized by Fourier transform infrared spectroscopy and differential scanning calorimetry. Batch adsorption experiments were performed to study the adsorption of the material in terms of adsorption kinetics, isotherms, and thermodynamic parameters. The results showed that the imprinted polymer exhibited higher affinity for PYD compared to non-imprinted polymer (NIP). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=molecularly%20imprinted%20polymer" title="molecularly imprinted polymer">molecularly imprinted polymer</a>, <a href="https://publications.waset.org/abstracts/search?q=bulk%20polymerization" title=" bulk polymerization"> bulk polymerization</a>, <a href="https://publications.waset.org/abstracts/search?q=environmental%20pollutant" title=" environmental pollutant"> environmental pollutant</a>, <a href="https://publications.waset.org/abstracts/search?q=adsorption" title=" adsorption"> adsorption</a> </p> <a href="https://publications.waset.org/abstracts/129920/synthesis-and-characterization-of-molecularly-imprinted-polymer-as-a-new-adsorbent-for-the-removal-of-pyridine-from-organic-medium" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/129920.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">142</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1937</span> Segmental Dynamics of Poly(Alkyl Methacrylate) Chain in Ultra-Thin Spin-Cast Films</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hiroyuki%20Aoki">Hiroyuki Aoki</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Polymeric materials are often used in a form of thin film such as food wrap and surface coating. In such the applications, polymer films thinner than 100 nm have been often used. The thickness of such the ultra-thin film is less than the unperturbed size of a polymer chain; therefore, the polymer chain in an ultra-thin film is strongly constrained. However, the details on the constrained dynamics of polymer molecules in ultra-thin films are still unclear. In the current study, the segmental dynamics of single polymer chain was directly investigated by fluorescence microscopy. The individual chains of poly(alkyl methacrylate) labeled by a perylenediimide dye molecule were observed by a highly sensitive fluorescence microscope in a defocus condition. The translational and rotational diffusion of the center segment in a single polymer chain was directly analyzed. The segmental motion in a thin film with a thickness of 10 nm was found to be suppressed compared to that in a bulk state. The detailed analysis of the molecular motion revealed that the diffusion rate of the in-plane rotation was similar to the thin film and the bulk; on the other hand, the out-of-plane motion was restricted in a thin film. This result indicates that the spatial restriction in an ultra-thin film thinner than the unperturbed chain dimension alters the dynamics of individual molecules in a polymer system. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=polymer%20materials" title="polymer materials">polymer materials</a>, <a href="https://publications.waset.org/abstracts/search?q=single%20molecule" title=" single molecule"> single molecule</a>, <a href="https://publications.waset.org/abstracts/search?q=molecular%20motion" title=" molecular motion"> molecular motion</a>, <a href="https://publications.waset.org/abstracts/search?q=fluorescence%20microscopy" title=" fluorescence microscopy"> fluorescence microscopy</a>, <a href="https://publications.waset.org/abstracts/search?q=super-resolution%20techniques" title=" super-resolution techniques"> super-resolution techniques</a> </p> <a href="https://publications.waset.org/abstracts/73362/segmental-dynamics-of-polyalkyl-methacrylate-chain-in-ultra-thin-spin-cast-films" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/73362.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">318</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=batch%20bulk%20methyl%20methacrylate%20polymerization&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=batch%20bulk%20methyl%20methacrylate%20polymerization&page=3">3</a></li> <li class="page-item"><a class="page-link" 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