Download or read book Synthesis and Characterization of Nucleobase Functionalized Polymers written by Lowie Maes (Doctor of Sciences: Chemistry) and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Characterization of Nucleobase Functionalized Polymers written by Lowie Maes and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Functionalized Polymers written by Narendra Pal Singh Chauhan and published by CRC Press. This book was released on 2021-05-14 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: Functionalized polymers are macromolecules to which chemically bound functional groups are attached which can be used as catalysts, reagents, protective groups, etc. Functionalized polymers have low cost, ease of processing and attractive features for functional organic molecules. Chemical reactions for the introduction of functional groups in polymers and the conversion of functional groups in polymers depend on different properties. Such properties are of great importance for functionalization reactions for possible applications of reactive polymers. This book deals with the synthesis and design of various functional polymers, the modification of preformed polymer backbones and their various applications.
Download or read book Preparation and Characterization of Nucleobase Functionalized Poly phenylenevinylene written by Alan Blayney and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Conjugated polymers (CPs) are unique among organic materials due to their diverse electrical and optical properties. Whereas most polymers are excellent insulators, conducting and semiconducting CPs have found use in several domains of electronics as active circuit components. Their use, however, is limited in part by their relatively disordered microstructure compared to other electronic materials, and the impact this has on their properties. Although polymers are usually microscopically disordered materials, DNA nanotechnology has emerged as a means of creating well-defined structures on remarkably small scales using purely polymeric systems. This fine morphology control is enabled by the great strength and specificity of the base-pairing interactions that take place between / moieties pendant to the main polymer chain. Despite being created by evolution in biological systems, these interactions have been harnessed in entirely artificial contexts as a means of controlling the spatial position of not just DNA strands, but also various functional materials. Inspired by the successes of structural DNA nanotechnology, the synthesis of a nucleobase-functionalized conjugated polymer (NB-CP) has been investigated. Poly(phenylenevinylene) can be used in the production of a wide array of electronic devices, and has been extensively studied. As such, it provided an excellent model system with which to explore the nucleobase-driven control of interactions between CPs. We conducted a thorough review of the diverse synthetic approaches that have been applied to the preparation of PPV, and palladium-catalyzed polymerizations were identified as promising methods of preparing the material. The Stille, Mizoroki-Heck, and Suzuki couplings were explored. Using the Stille reaction, achieving sufficiently large molecular weights proved challenging. Mizoroki-Heck polycondensation under optimized conditions overcame this problem; however, the resulting material was found to contain structural defects due to poor regioselectivity. A new monomer was therefore prepared, and it was found that that the Suzuki coupling could produce low-defect PPV with a degree of polymerization greater than 30. This method was then used to prepare both adenine- and thymine-substituted PPV, which were found to have higher photoluminescence quantum yield than the parent PPV. " --
Download or read book Synthesis and Characterization of Chromophore Functionalized Conjugated Polymers written by Biwang Jiang and published by . This book was released on 1998 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Functionalized polymers synthesis and properties written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Characterization of Pendant functionalized Polymers from Baylis Hillman Adducts written by Chao Peng and published by . This book was released on 2013 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past decades, chemists have explored various approaches to prepare functionalized polymers for improved properties. The combination of organic chemistry and polymer chemistry is a promising approach to build novel polymer structures, therefore synthetic organic chemistry has been employed to design novel monomers for polymer synthesis. Our group takes advantage of the Baylis-Hillman reaction, since it is a simple and convenient method to synthesize densely functionalized molecules. This feature makes Baylis-Hillman adducts good substrates for synthesizing functionalized polymers. In this work, we synthesized two types of polymers by a bottom-up design of monomers using Baylis-Hillman (BH) reaction. We designed two types of monomers: a hydroxyl-functionalized acrylate and an unsaturated diol, which can undergo chain-growth polymerization and step-growth polymerization, respectively. Using the BH acrylate, we synthesized a hydroxyl-functionalized polyacrylate via reversible addition-fragmentation chain transfer (RAFT) polymerization. Using a BH diol, we were able to synthesize an unsaturated poly(ester-urethane). This unsaturated poly(ester-urethane) can undergo post-functionalization via thiol-ene click reaction. Thermal properties and potential applications of these polymers were investigated.
Download or read book Conjugated Polymers written by Klaus Mullen and published by Royal Society of Chemistry. This book was released on 2014 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conjugated polymers are gaining a lot of interest due to their inherent functional properties and applications in plastic electronics. In order to develop new functional polymers researchers need the background information on the synthesis of the different polymer systems. This book focuses on the practical preparation of conjugated polymers with each chapter discussing a particular type of conjugated polymer including a general explanation of the polymer, experimental details for synthesis and characterization.
Download or read book Synthesis and Characterization of Highly Functionalized Carbon chain Polymers written by Lawino C. Kagumba and published by . This book was released on 2001 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polymer Synthesis Theory and Practice written by Dietrich Braun and published by Springer Science & Business Media. This book was released on 2012-12-13 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emphasis is on a broad description of the general methods and processes for the synthesis, modification and characterization of macromolecules. These more fundamental chapters will be supplemented by selected and detailed experiments. In addition to the preparative aspects, the book also gives the reader an impression on the relation of chemical constitution and morphology of Polymers to their properties, as well as on their application areas. Thus, an additional textbook will not be needed in order to understand the experiments. The 5th edition contains numerous changes: In recent years, so-called functional polymers which have special electrical, electronic, optical and biological properties, have gained more and more in interest. This textbook was therefore supplemented by recipes which describe the synthesis of these materials in a new chapter "Functional polymers". Together with new experiments in chapter 3,4 and 5 the book now contains more than 120 recipes that describe a wide range of macromolecules. From the reviews of recent editions: "This is an excellent book for all polymer chemists engaged in synthesis research studies and education. It is educationally sound and has excellent laboratory synthetic examples. The fundamentals are well done for the teaching of students and references are resonably up-to-date. As in previous issues, there are sections dealing with an introduction; structure and nomenclature; methods and techniques for synthesis, characterization, processing and modification of polymers. ....The authors have noted the following changes from previous editions- a new section on correlations of structure, morphology and properties; revision and enlargement of other property and characterization procedures; additional new experiments such as controlled radical polymerization; enzymatic polymerizations; microelmulsions; and electrical conducting polymers. This is a high quality textbook at a reasonable price and should be considered as a suitable reference for all engaged in synthetic areas of polymer research." (Eli M. Pearce, Polytechnic University, Brooklyn, NY, USA)
Download or read book Controlled Synthesis and Characterization of Branched Functionalized and Cyclic Polymers written by Vijay Chavan and published by . This book was released on 2011 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: A variety of methods were used to make polymers with different architecture and functionalities. The linking chemistry of vinyldimethylchlorosilane (VDMCS) with poly(styryl)lithium (M[subscript n] = 1,700-3,000 g/mol) was studied. The average degree of branching varied from 7.5 to 9.4 with an increase in concentration of VDMCS (1.2 to 5.2 eq). The intrinsic viscosities and melt viscosities (at 160°C) of the star polymers were found to be less than half of that of the corresponding linear polystyrenes. [alpha]-Pyrrolidine-functionalized polystyrene (M[subscript n] = 2,700 g/mol, M[subscript w]/M[subscript n] = 1.03, 92.5%) was successfully synthesized from [alpha]-chloromethyldimethylsilane-functionalized polystyrene (M[subscript n] = 2,600 g/mol, M[subscript w]/M[subscript n] = 1.02) based on NMR spectroscopy, MALDI-TOF and ESI mass spectrometry. The stability of silyl hydride groups under atom transfer radical polymerization conditions was proven by copolymerizing methyl methacrylate and (4-vinylphenyl)dimethylsilane (VPDS). Tapered block copolymers of isoprene, VPDS, and styrene with narrow molecular weight distributions (1.04 and 1.05) were synthesized via anionic polymerization. Evidence regarding the topology of cyclic polybutadienes was obtained by Atomic Force Microscopy of grafted polymers obtained by grafting an excess of silyl hydride-functionalized polystyrene (M[subscript n] = 8,300 g/mol, M[subscript w]/M[subscript n] =1.01) onto cyclic polybutadiene (M[subscript n]=88,000 g/mol, M[subscript w]/M[subscript n] = 2.0). The reactivity of polyisobutylene carbocations was compared with respect to competitive electrophilic addition to a vinyl group versus silyl hydride transfer by investigating the reaction with VPDS. Based on GPC results, and 1H and 13C NMR spectroscopy, no evidence for any vinyl group addition was observed. A successful attempt was made to prepare electrospun fibers from fluoro-functionalized styrene-butadiene elastomers. The water contact angle of these surfaces was found to be 162.8° [plus or minus] 3.8° for the fibrous mat of the fluorinated polymers as compared to 151.2° [plus or minus] 2.4° for the analogous fibrous mat of the non-fluorinated polymers. In-chain functionalization of tapered styrene butadiene rubber using chloromethydimethylsilane was quantitatively done via a hydrosilation reaction. Pyrrolidine-functionalized styrene butadiene rubber was obtained in 71% yield after reacting pyrrolidine with chloromethyldimethylsilane-functionalized styrene butadiene rubber. In-chain, silyl hydride-functionalized, deuterated polystyrene (M[subscript n] = 2,100 g/mol, M[subscript w]/M[subscript n] = 1.01) was functionalized with allyl cyanide in the presence of Karstedt's catalyst to obtain in-chain cyano-functionalized, deuterated polystyrene (45% based on the mass of in-chain, cyano-functionalized deuterated polystyrene obtained).
Download or read book Synthesis and Characterization of New Conjugated Functional Polymers written by Hong Meng and published by . This book was released on 1999 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis Characterization and Applications of Selectively Functionalized Network Polymers written by Gregory James Stoddard and published by . This book was released on 1989 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hyperbranched Polymers written by Deyue Yan and published by John Wiley & Sons. This book was released on 2011-05-04 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: A much-needed overview of the state of the art of hyperbranched polymers The last two decades have seen a surge of interest in hyperbranched polymers due to their ease of synthesis on a large scale and their promising applications in diverse fields, from medicine to nanotechnology. Written by leading scientists in academia and industry, this book provides for the first time a comprehensive overview of the topic, bringing together in one complete volume a wealth of information previously available only in articles scattered across the literature. Drawing on their work at the cutting edge of this dynamic area of research, the authors cover everything readers need to know about hyperbranched polymers when designing highly functional materials. Clear, thorough discussions include: How irregular branching affects polymer properties and their potential applications Important theoretical basics, plus a useful summary of characterization techniques How hyperbranched polymers compare with dendrimers as well as linear polymers Future trends in the synthesis and application of hyperbranched polymers Geared to novices and experts alike, Hyperbranched Polymers is a must-have resource for anyone working in polymer architectures, polymer engineering, and functional materials. It is also useful for scientists in related fields who need a primer on the synthesis, theory, and applications of hyperbranched polymers.
Download or read book New u01CC functional Polymers written by and published by . This book was released on 2006 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Characterization of Novel Functional Polymeric Materials written by Ankit Vora and published by . This book was released on 2008 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Conducting Polymers 2 Volume Set written by Terje A. Skotheim and published by CRC Press. This book was released on 2007-01-16 with total page 1692 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn how recent advances are fueling new possibilities in textiles, optics, electronics, and biomedicine! As the field of conjugated, electrically conducting, and electroactive polymers has grown, the Handbook of Conducting Polymers has been there to document and celebrate these changes along the way. Now split into two vo
