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Synthesis And Characterization Of Stimuli Responsive Polymers With Aqueous Atom Transfer Radical Polymerization
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Book Synopsis Synthesis and Characterization of Stimuli-responsive Polymers with Aqueous Atom Transfer Radical Polymerization by : Collin N. Britten
Download or read book Synthesis and Characterization of Stimuli-responsive Polymers with Aqueous Atom Transfer Radical Polymerization written by Collin N. Britten and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis of Stimuli-responsive Polymers Via Nitroxide Mediated Polymerization and Characterization in Aqueous and Ionic Liquid Solutions by : Chi Zhang
Download or read book Synthesis of Stimuli-responsive Polymers Via Nitroxide Mediated Polymerization and Characterization in Aqueous and Ionic Liquid Solutions written by Chi Zhang and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Stimuli-responsive polymers have been touted as "smart" due to their fast and reversible responses to environmental changes. It is imperative for these polymers to have well-defined structures so that their performance can be consistent and predictable. In order to achieve this, nitroxide mediated polymerization (NMP) was employed as the synthesis technique for the microstructured polymers that form the core of the investigations presented in this thesis. As one of the main controlled radical polymerization techniques, NMP stands out for its simplicity in both required ingredients and purification procedures. Many known stimuli-responsive polymers are poly(methacrylates). However, homopolymerization of methacrylates has been challenging for NMP mainly due to the large equilibrium constant that resulted in high concentration of active radicals and thus excessive irreversible terminations. By using a small amount of "controlling co-monomer" such as styrene, copolymerizations with methacrylate-rich feeds can be controlled using the commercially available alkoxyamine initiator BlocBuilderTM via NMP, featuring linear increases in number average molecular weight versus conversion, and narrow molecular weight distribution.In this thesis, two methacrylates, namely 2-(dimethylamino)ethyl methacrylate (DMAEMA) and benzyl methacrylate (BzMA), whose homopolymers exhibit LCST-type phase separation behaviours in aqueous and ionic liquid (IL) solutions, respectively, were copolymerized with various controlling co-monomers by NMP to demonstrate the versatility of NMP in tuning thermo-responsive properties. For both methacrylates, styrene was initially used as the controlling co-monomer to obtain copolymers with relatively narrow molecular weight distribution and ability to extend chains to form block copolymers when reinitiated with a fresh batch of monomer. 2-Vinylpyridine (2VP) was then chosen to copolymerize with DMAEMA for its lower hydrophobicity compared to styrene and pH-sensitivity, where about 2 - 5 mol% 2VP was shown sufficient to obtain well-defined DMAEMA/2VP copolymers. The detailed phase behaviour characterization of these DMAEMA-rich copolymers in aqueous solutions revealed the effects of important factors such as pH, copolymer composition, solution concentration and polymer microstructure, on the tuning of transition temperatures.For BzMA, 9-(4-vinylbenzyl)-9H-carbazole (VBK) was used as an alternative controlling co-monomer. Controlled and pseudo-"living" copolymerizations were achieved with as little as 2 mol% VBK in the feed, demonstrating significant improvement compared to the BzMA/styrene system. The incorporation of fluorescent VBK resulted in 5-fold fluorescence enhancement during the phase separation of BzMA/VBK copolymers from IL [C2mim][NTf2]. The enhancement resulted from heightened efficiency of the fluorescence resonance energy transfer (FRET) between BzMA and VBK during aggregation. However, the solvatophobicity of VBK also significantly reduced the solubility of BzMA/VBK copolymers in the IL and rendered the phase separation irreversible. Further investigation on the effects of solvatophilicity and chain mobility on phase separation and reversibility in ILs was carried out by incorporating varying amounts of solvatophilic co-monomer, namely methyl methacrylate (MMA) and oligo(ethylene glycol) methacrylate (OEGMA), yielding BzMA/MMA/VBK and BzMA/OEGMA/VBK terpolymers. It was found that molecular weight, glass transition temperature, and solution concentration all played important roles on phase separation temperature but sufficiently high solvatophilicity (quantified by the concentration of solvatophilic group) was essential to facilitate the re-dissolution process after phase separation. " --
Book Synopsis Organic-Inorganic Hybrid Nanomaterials by : Susheel Kalia
Download or read book Organic-Inorganic Hybrid Nanomaterials written by Susheel Kalia and published by Springer. This book was released on 2014-12-04 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Polymer Science enjoys a longstanding tradition and good reputation in its community. Each volume is dedicated to a current topic, and each review critically surveys one aspect of that topic, to place it within the context of the volume. The volumes typically summarize the significant developments of the last 5 to 10 years and discuss them critically, presenting selected examples, explaining and illustrating the important principles, and bringing together many important references of primary literature. On that basis, future research directions in the area can be discussed. Advances in Polymer Science volumes thus are important references for every polymer scientist, as well as for other scientists interested in polymer science - as an introduction to a neighboring field, or as a compilation of detailed information for the specialist.
Book Synopsis Smart Polymers and their Applications by : Maria Rosa Aguilar
Download or read book Smart Polymers and their Applications written by Maria Rosa Aguilar and published by Elsevier. This book was released on 2014-02-19 with total page 587 pages. Available in PDF, EPUB and Kindle. Book excerpt: Smart polymers are polymers that respond to different stimuli or changes in the environment. Smart Polymers and their Applications reviews the types, synthesis, properties, and applications of smart polymers. Chapters in part one focus on types of polymers, including temperature-, pH-, photo-, and enzyme-responsive polymers. Shape memory polymers, smart polymer hydrogels, and self-healing polymer systems are also explored. Part two highlights applications of smart polymers, including smart instructive polymer substrates for tissue engineering; smart polymer nanocarriers for drug delivery; the use of smart polymers in medical devices for minimally invasive surgery, diagnosis, and other applications; and smart polymers for bioseparation and other biotechnology applications. Further chapters discuss the use of smart polymers for textile and packaging applications, and for optical data storage. Smart Polymers and their Applications is a technical resource for chemists, chemical engineers, mechanical engineers, and other professionals in the polymer industry; manufacturers in such sectors as medical, automotive, and aerospace engineering; and academic researchers in polymer science. - Reviews the different types of smart polymer, discussing their properties, structure, design, and characterization - Reviews applications of smart polymers in such areas as biomedical engineering, textiles, and food packaging
Book Synopsis Living and Controlled Polymerization by : Joseph Jagur-Grodzinski
Download or read book Living and Controlled Polymerization written by Joseph Jagur-Grodzinski and published by Nova Publishers. This book was released on 2006 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: The living/controlled polymerisation techniques opened new vistas in polymer chemistry. The leading authorities in this field and its pioneers contributed chapters to this collective volume. The controlled polymerisation techniques have enabled preparation of polymers, copolymers, and block copolymers with predetermined molecular weights and narrow polydispersity, in which functional groups or biologically active molecules could be placed at well defined locations. They have also enabled preparation of advanced polymeric structures with precisely determined architectures and improved properties. Moreover, they have provided opportunities for preparation of novel polymeric materials from monomers, which before have not been suitable or accessible for such purposes. Properties of some of these polymeric materials may be significantly different from those of the existing ones. They provide opportunities for new applications. Several patents have already been approved for such speciality applications as, drug delivery, biocompatible surfaces, thermoplastic elastomers, moisture curable sealants, and so on. Many more products, based on polymers fabricated by the living/ controlled polymerisation techniques, will certainly emerge in such specialised areas as, nanotechnology, medical devices, "smart polymers", sensors , smart separation technologies, optical fibres and other optical applications, various biomaterials, etc.
Book Synopsis Stimuli-Responsive Polymers by : Lowe
Download or read book Stimuli-Responsive Polymers written by Lowe and published by . This book was released on 2015-01-26 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Controlled/living Radical Polymerization by : Krzysztof Matyjaszewski
Download or read book Advances in Controlled/living Radical Polymerization written by Krzysztof Matyjaszewski and published by . This book was released on 2003 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Controlled/Living Radical Polymerization presents new developments in controlled/living radical polymerization in three areas: atom transfer radical polymerization (ATRP), nitroxide mediated polymerization (NMP), and reversible addition-fragmentation transfer (RAFT). This book also includes synthesis and characterization of many new materials.
Book Synopsis Reversible Deactivation Radical Polymerization by : Nikhil K. Singha
Download or read book Reversible Deactivation Radical Polymerization written by Nikhil K. Singha and published by Walter de Gruyter GmbH & Co KG. This book was released on 2020-01-20 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes strategies and mechanism of reversible deactivation radical polymerization (RDRP) to synthesize functional polymers. Several approaches such as atom transfer radical polymerization and the combination of click chemistry and RDRP are summarized. Contributors from interdisciplinary fields highlight applications in nanotechnology, self-healing materials, oil and water resistant coatings and controlled drug delivery systems.
Book Synopsis Functional Polymer Films, 2 Volume Set by : Wolfgang Knoll
Download or read book Functional Polymer Films, 2 Volume Set written by Wolfgang Knoll and published by John Wiley & Sons. This book was released on 2013-02-12 with total page 1107 pages. Available in PDF, EPUB and Kindle. Book excerpt: Very thin film materials have emerged as a highly interesting and useful quasi 2D-state functionality. They have given rise to numerous applications ranging from protective and smart coatings to electronics, sensors and display technology as well as serving biological, analytical and medical purposes. The tailoring of polymer film properties and functions has become a major research field. As opposed to the traditional treatise on polymer and resin-based coatings, this one-stop reference is the first to give readers a comprehensive view of the latest macromolecular and supramolecular film-based nanotechnology. Bringing together all the important facets and state-of-the-art research, the two well-structured volumes cover film assembly and depostion, functionality and patterning, and analysis and characterization. The result is an in-depth understanding of the phenomena, ordering, scale effects, fabrication, and analysis of polymer ultrathin films. This book will be a valuable addition for Materials Scientists, Polymer Chemists, Surface Scientists, Bioengineers, Coatings Specialists, Chemical Engineers, and Scientists working in this important research field and industry.
Book Synopsis Handbook of Radical Polymerization by : Krzysztof Matyjaszewski
Download or read book Handbook of Radical Polymerization written by Krzysztof Matyjaszewski and published by John Wiley & Sons. This book was released on 2002-08-08 with total page 934 pages. Available in PDF, EPUB and Kindle. Book excerpt: * Provides a concise source of information on synthetic techniques, purification, and characterization methods for free-radical polymers. * Presents information on future trends in the synthesis of free-radical polymers.
Book Synopsis Synthesis and Characterization of Telechelic Polymers by the Combination of Reserve Atom Transfer Radical Polymerization and Atom Transfer Radical Coupling Processes by : Binnur Aydoğan
Download or read book Synthesis and Characterization of Telechelic Polymers by the Combination of Reserve Atom Transfer Radical Polymerization and Atom Transfer Radical Coupling Processes written by Binnur Aydoğan and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Controlled/living Radical Polymerization by : Krzysztof Matyjaszewski
Download or read book Controlled/living Radical Polymerization written by Krzysztof Matyjaszewski and published by . This book was released on 2000 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines recent progress in controlled/living radical polymerization. The volume focuses on three synthetic methods: atom transfer radical polymerization, nitroxide mediated polymerization and degenerative transfer via addition fragmentation. In addition, the volume covers the preparation and characterization of many never before seen materials using ATRP, NMP and RAFT.
Book Synopsis Synthesis of Amino Functional Monomers Via Controlled Radical Polymerization by : Xeniya Savelyeva
Download or read book Synthesis of Amino Functional Monomers Via Controlled Radical Polymerization written by Xeniya Savelyeva and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Controlled radical polymerization (CRP) techniques has allowed the synthesis of numerous polymeric materials with comparable control to that of true "living" techniques without the need for stringent manipulation techniques. The control over chain length, dispersity and composition is desirable in many fields, such as stimuli-responsive (temperature or pH) drug carriers. These thermoresponsive polymers in aqueous media are often characterized by lower critical solution temperature (LCST) behavior, where the polymer becomes insoluble with temperature increases. The LCST can be tuned by the structural features of the constituent monomer, molecular weight, molecular weight distribution and copolymerization with other monomers. Narrow molecular weight distribution is the key factor determining the sharpness needed for determining the LCST, which is often exemplified by the cloud point temperature (CPT). Using CRP techniques, specifically nitroxide mediated polymerization (NMP), with an alkoxyamine unimolecular initiator, 2-([tert-butyl[1-(diethoxyphosphoryl)-2,2-dimethylpropyl]amino]oxy)-2-methylpropanoic acid (BlocBuilder) and an additional free nitroxide (SG1), the effect of controlling comonomer (9-(4-vinylbenzyl)-9H-carbazole (VBK)) on polymerization kinetics of N-(2-methacryloyloxyethyl) pyrrolidone (MAEPYR) and the effect of final copolymer composition on CPT was studied. Adding at least 5 mol% VBK, the dispersity Đ of the poly(MAEPYR-stat-VBK) copolymers was below 1.4. The CPT decreased from 59.0 °C to 49.7 °C with addition of only 1 mol% of VBK in the copolymer, and it can be further fine-tuned by changing the solution concentration and the heating rate. Another CRP technique, reversible addition fragmentation chain-transfer polymerization (RAFT), was applied to homopolymerization of N-(3-methoxypropyl) acrylamide (MPAM) to yield well-defined polymers (with (M_n)− = 14.3 - 25.2 kg mol-1 and low Đ ~ 1.17 - 1.47) needed for precise determination of CPT. Thermoresponsive behaviour of poly(MPAM) in aqueous media revealed CPTs between 73 and 92 °C, unlike other literature reports where the polymers, synthesized by conventional radical polymerization, showed conflicting results regarding their LCST" --
Book Synopsis Biomedical Applications of Polymeric Materials and Composites by : Raju Francis
Download or read book Biomedical Applications of Polymeric Materials and Composites written by Raju Francis and published by John Wiley & Sons. This book was released on 2016-12-19 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: With its content taken from only the very latest results, this is an extensive summary of the various polymeric materials used for biomedical applications. Following an introduction listing various functional polymers, including conductive, biocompatible and conjugated polymers, the book goes on to discuss different synthetic polymers that can be used, for example, as hydrogels, biochemical sensors, functional surfaces, and natural degradable materials. Throughout, the focus is on applications, with worked examples for training purposes as well as case studies included. The whole is rounded off with a look at future trends.
Book Synopsis Controlled and Living Polymerizations by : Krzysztof Matyjaszewski
Download or read book Controlled and Living Polymerizations written by Krzysztof Matyjaszewski and published by John Wiley & Sons. This book was released on 2009-09-28 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by a highly prestigious and knowledgeable team of top scientists in the field, this book provides an overview of the current status of controlled/living polymerization, combining the synthetic, mechanistic and application-oriented aspects. From the contents: * Anionic Vinyl Polymerization * Carbocationic Polymerization * Radical Polymerization * Coordinative Polymerization of Olefins * Ring-Opening Polymerization of Heterocycles * Ring-Opening Metathesis Polymerization * Macromolecular Architectures * Complex Functional Macromolecules * Synthesis of Block and Graft Copolymers * Bulk and Solution Structures of Block Copolymers * Industrial Applications While some of the material is based on chapters taken from the four-volume work "Macromolecular Engineering", it is completely updated and rewritten to reflect the focus of this monograph. Must-have knowledge for polymer and organic chemists, plastics technologists, materials scientists and chemical engineers.
Book Synopsis Handbook of Stimuli-Responsive Materials by : Marek W. Urban
Download or read book Handbook of Stimuli-Responsive Materials written by Marek W. Urban and published by John Wiley & Sons. This book was released on 2011-02-25 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adopting a broad approach, this volume provides the scientific community with a much-needed overview of developments and scientific findings in stimuli-responsive materials. Its primary focus is on the designing, synthesizing, formulating, and processing of materials that lead to an understanding of the scientific principles governing response driven functions leading to future technologies. The highly experienced and internationally renowned editor has assembled a team of leading scientists from the interdisciplinary areas of: * polymers * biopolymers * biochemistry * biophysics * biomaterials * bioengineering * materials engineering * biotechnology * chemistry * physics * ceramics * metals * and materials science. A combination that guarantees a unique and high-quality handbook.
Book Synopsis Stimuli-Responsive Materials by : Marek W Urban
Download or read book Stimuli-Responsive Materials written by Marek W Urban and published by Royal Society of Chemistry. This book was released on 2019-03-15 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ability for a material to change properties in response to external stimuli is an attractive feature for numerous applications and as such stimuli responsive materials are gaining attention across many different fields. This book introduces the concepts of stimuli-responsiveness, including the fundamental materials properties required for design. It provides readers with comprehensive scientific principles and developments of stimuli responsive materials, as well as the recent technological advances. Written by a renowned expert in the field, this book is suitable for anyone interested in stimuli responsive materials working in polymers, biochemistry, biotechnology and materials science.
