Download or read book Dynamics of Hydrogen Bonding Polymer Blends Exhibiting Minimized Self Associations and Liquid Crystalline Polymers of Unique Chemistry written by Kevin Allen Masser and published by . This book was released on 2010 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrogen Bonded Polymers written by Wolfgang Binder and published by Springer Science & Business Media. This book was released on 2007-03-16 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: Control of polymeric structure is among the most important endeavours of modern macromolecular science. In particular, tailoring the positioning and strength of intermolecular forces within macromolecules by synthetic methods and thus gaining structural control over the final polymeric materials has become feasible, resulting in the field of supramolecular polymer science. Besides other intermolecular forces, hydrogen bonds are unique intermolecular forces enabling the tuning of material properties via self-assembly processes over a wide range of interactions strength ranging from several kJmol to several tens of kJmol . Central for the formation of these structures are precursor molecules of small molecular weight (usually lower than 10 000), which can assemble in solid or solution to aggregates of defined geometry.
Download or read book Rheology of Miscible Polymer Blends with Hydrogen Bonding written by Zhiyi Yang and published by . This book was released on 2007 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Poly(4-vinylphenol) (PVPh) was blended with four different polymers: poly(vinyl methyl ether) (PVME), poly(vinyl acetate) (PVAc), poly(2-vinylpyridine) (P2VP), and poly(4-vinylpyridine) (P4VP) by solvent casting. The miscibility of these four PVPh-based blend systems was investigated using differential scanning calorimetry (DSC) and the composition-dependent glass transition temperature (Tg) was predicted by a thermodynamic theory. The hydrogen bonds between phenolic group in PVPh and either group, carbonyl group or pyridine group was confirmed by Fourier transform infrared (FTIR) spectroscopy. The fraction of hydrogen bonds was calculated by the Coleman-Graf-Painter association model. Linear dynamic viscoelasticity of four PVPh-based miscible polymer blends with hydrogen bonding was investigated. Emphasis was placed on investigating how the linear dynamic viscoelasticity of miscible polymer blends with specific interactive might be different from that of miscible polymer blends without specific interaction. We have found that an application of time-temperature superposition (TTS) to the PVPh-based miscible blends with intermolecular hydrogen bonding is warranted even when the difference in the component glass transition temperatures is as large as about 200°C, with TTS fails for miscible polymer blends without specific interactions. On the basis of such an observation, we have concluded that hydrogen bonding suppressed concentration fluctuations in PVPh-based miscible blends. It has been found that both the intra-association (self-association) of the phyenoxy hydroxyl groups in PVPh and inter-association (intermolecular interactions) between the constituent components have a profound influence on the frequency dependence of dynamic moduli in the terminal region of the PVPh-based miscible blend systems investigated. Hydrogenated functional polynorbornenes (HFPNBs) were synthesized and they were used to investigate the miscibility and rheology of HFPNB-based miscible blends with hydrogen bonding. Specifically, functional norborneses with carboxylic ( -COOH) group of hydroxyl ( -OH) group were first synthesized and then they were polymerized, via ring-opening metathesis polymerization followed by hydrogenation, to obtain HFPNBs, HPNBCOOH and HPNBOH. Subsequently, the miscibility of binary blends consisting of (1) HPBNCOOH and polycarbonate (PC), (2) HPBNCOOH and poly(2-vinylpyridine) (P2VP), and (3) HPBNOH and PC was investigated using DSC and FTIR spectroscopy. It has been found that both PC/HPBNCOOH and P2VP/HPBNCOOH blend systems exhibit a broad, single glass transition over the entire blend compositions as determined by DSC, indicating that the respective blend systems are miscible, and they form hydrogen bonds as determined by FTIR spectroscopy. On the other hand, PC/HPBNOH blends were found to exhibit two glass transition temperatures, indicating that the blends are not miscible. The dynamic oscillatory shear rheometry has shown than reduced log G' versus log a(T) plots, and also log G' versus log G" plots of PC/HPBNCOOH and P2VP/HPBNCOOH blend systems are independent of temperature. We have concluded that an application of TTS to the miscible polymer blends with hydrogen bonding is warranted although the difference in component glass transition temperatures is as large as 91 °C for the PC/HPNBCOOH blend system."--Abstract.
Download or read book Hydrogen Bonding in Polymeric Materials written by Shiao-Wei Kuo and published by John Wiley & Sons. This book was released on 2018-01-18 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summarizing our current knowledge of the topic, this book describes the roles and effects of hydrogen bonding in polymer materials by reviewing the latest developments over recent years. To this end, it discusses all relevant aspects from the fundamentals, via characterization, to properties and applications in various polymeric materials, including polymer blends, block copolymers, mesoporous materials, biomacromolecules and nanocomposites. Invaluable reading for scientists in polymers and materials as well as those working in macromolecular chemistry.
Download or read book Hydrogen bonded Interpolymer Complexes written by Vitaliy V. Khutoryanskiy and published by World Scientific. This book was released on 2009 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: There has been an increased interest among researchers in hydrogen-bonded interpolymer complexes since the first pioneering papers were published in the early 1960s. Several hundred research papers have been published on various aspects of complex formation reactions in solutions and interfaces, properties of interpolymer complexes and their potential applications. This book focuses on the latest developments in the area of interpolymer complexation via hydrogen bonding. It represents a collection of original and review articles written by recognized experts from Germany, Greece, Kazakhstan, Poland, Romania, Russia, UK, Ukraine, and the USA. It highlights many important applications of interpolymer complexes, including the stabilization of colloidal systems, pharmaceuticals, and nanomaterials.
Download or read book Hydrogen Bonded Supramolecular Materials written by Zhan-Ting Li and published by Springer. This book was released on 2016-10-06 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an up-to-date text covering topics in utilizing hydrogen bonding for constructing functional architectures and supramolecular materials. The first chapter addresses the control of photo-induced electron and energy transfer. The second chapter summarizes the formation of nano-porous materials. The following two chapters introduce self-assembled gels, many of which exhibit unique functions. Other chapters cover the advances in supramolecular liquid crystals and the versatility of hydrogen bonding in tuning/improving the properties and performance of materials. This book is designed to bring together in a single volume the most important and active fields of hydrogen bonding strategy for designing supramolecular materials. The book will be a valuable resource for graduates and researchers working in the fields of supramolecular chemistry and materials sciences. Zhan-Ting Li, PhD, is a Professor of Organic Chemistry at the Department of Chemistry, Fudan University, China Li-Zhu Wu, PhD, is a Professor of Organic Chemistry at the Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, China
Download or read book Hydrogen Bond Research written by Peter Schuster and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seven review articles and original papers provide a representative overview of the research work done in hydrogen bond research at Austrian universities. The topics covered by the contributions are: state-of-the-art of understanding hydrogen bonding in biopolymers; recent NMR techniques for studying hydrogen bonding in aqueous solutions; intramolecular hydrogen bonding and proton transfer in a class of Mannich bases derived from substituted phenols and naphthols; competition between intramolecular hydrogen bonds in ortho-disubstituted phenols; molecular dynamic simulations on proton transfer in 5,8-dihydroxynaphthoquinone and in the formic acid dimer; accurate calculations of the intermolecular interactions in cyanoacetylen dimers; correlation between OH...O bond distances and OH stretching frequencies as derived from structural and spectroscopic data of minerals.
Download or read book Aspects of Miscibility in Polymer Systems written by Frank Cangelosi and published by . This book was released on 1982 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flow induced Structure in Polymers written by Alan I. Nakatani and published by . This book was released on 1995 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examines recent advances in understanding the structures of polymer melts, polymer solutions, block copolymers, liquid crystalline polymers, colloid suspensions, and multiphase systems subjected to flow. Reports on advances in instrumental techniques, characterization, theories, and applications. An overview chapter provides a guide and reference source to related reviews and identifies similarities in flow behavior between various materials science disciplines.
Download or read book Tuning Mechanics of Bio inspired Polymeric Materials Through Supramolecular Chemistry written by Seyedali Monemian and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthetic polymers can be designed to meet a particular mechanical criterion, but it is still a challenge to design a polymeric material, which simultaneously exhibits strength and ductility, and elasticity. However, natural materials show exceptional mechanical performance, modulated by composition, environmental triggers, and architecture. One lesson from nature is the combination of weak supramolecular interactions and strong covalent bonds. Understanding of materials, such as the muscle protein titin that exhibits these hierarchical elements, provides inspiration to design polymers with novel mechanics. We explored multiple strategies to develop hierarchical and functional bio-inspired materials: First part of this dissertation focuses on a self-complementary, hydrogen bonding linkage coupled with ultraviolet (UV) crosslinking to design supramolecular elastomers with tunable mechanical response. This interplay of dynamic hydrogen-bonded network and covalently crosslinked network resulted in a range of mechanical performance, controlled via the concentration of hydrogen bonding moieties and the UV curing time. Of particular note, this unique combination dramatically enhanced mechanical response of the UPy-functionalized elastomers, yielding toughness enhancement up to ~200×. In second part of this dissertation, a new class of "supramolecular interpenetrating polymer networks (Supramolecular IPNs)" was introduced where the phase-separated structure of IPNs with dynamic hydrogen-bond forming supramolecular associations and UV cross-linking sites led to materials with both increased extensibility and strength. Fascinatingly, the strong interphase region of the dissimilar networks, along with the dynamic nature of hydrogen bond-forming supramolecular associations yielded up to ~600× enhancement of mechanical toughness. In another effort, the interplay of dynamic hydrogen-bond forming supramolecular associations and phase-segregation - induced by UV crosslinking of pendent vinyl moieties - was exploited to generate vesicles and droplet-decorated vesicles on a submicron scale in model supramolecular IPNs. Of particular note is, these structures were formed in the bulk via combination of thermal activation above order-to-disorder transition (ODT) temperature of supramolecular polymer component and UV-crosslinking induced phase-segregation, without the aid of solvophobic interactions or a dewetting process on the substrate. This facile approach may serve as a platform for the design of self-assembled architectures utilizing dynamic polymeric materials.
Download or read book Viscoelastic Behavior of Miscible Polymer Blends Exhibiting Strong Intermolecular Interactions written by R. Hagen and published by . This book was released on 1996 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamics of Hydrogen Bonds in the Melt state of Supramolecular Polymers written by Florian Herbst and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supramolecular polymers; hydrogen bonding; click chemistry; self-healing; polyisobutylene; poly(n-butyl acrylate); LCCP; ATRP
Download or read book Unusual Polymer Blends which Exhibit Synergistic Physical Properties written by Hugh Graham and published by . This book was released on 1992 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Constitutional Dynamic Chemistry written by Mihail Barboiu and published by Springer Science & Business Media. This book was released on 2012-03-24 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: Constitutional Dynamic Chemistry: Bridge from Supramolecular Chemistry to Adaptive Chemistry, by Jean-Marie Lehn Multistate and Phase Change Selection in Constitutional Multivalent Systems, by Mihail Barboiu Dynamic Systemic Resolution, by Morakot Sakulsombat, Yan Zhang and Olof Ramström Dynamic Combinatorial Self-Replicating Systems, by Emilie Moulin and Nicolas Giuseppone DCC in the Development of Nucleic Acid Targeted and Nucleic Acid Inspired Structures, by Benjamin L. Miller Dynamic Nanoplatforms in Biosensor and Membrane Constitutional Systems, by Eugene Mahon, Teodor Aastrup und Mihail Barboiu Dynamic Assembly of Block-Copolymers, by D. Quémener, A. Deratani und S. Lecommandoux Dynamic Chemistry of Anion Recognition, by Radu Custelcean Supramolecular Naphthalenediimide Nanotubes, by Nandhini Ponnuswamy, Artur R. Stefankiewicz, Jeremy K. M. Sanders und G. Dan Pantoş Synthetic Molecular Machines and Polymer/Monomer Size Switches that Operate Through Dynamic and Non-Dynamic Covalent Changes, by Adrian-Mihail Stadler und Juan Ramírez Reversible Covalent Chemistries Compatible with the Principles of Constitutional Dynamic Chemistry: New Reactions to Create More Diversity, by Kamel Meguellati und Sylvain Ladame.
Download or read book Characterization of Polymer Blends written by Sabu Thomas and published by John Wiley & Sons. This book was released on 2015-02-09 with total page 972 pages. Available in PDF, EPUB and Kindle. Book excerpt: Filling the gap for a reference dedicated to the characterization of polymer blends and their micro and nano morphologies, this book provides comprehensive, systematic coverage in a one-stop, two-volume resource for all those working in the field. Leading researchers from industry and academia, as well as from government and private research institutions around the world summarize recent technical advances in chapters devoted to their individual contributions. In so doing, they examine a wide range of modern characterization techniques, from microscopy and spectroscopy to diffraction, thermal analysis, rheology, mechanical measurements and chromatography. These methods are compared with each other to assist in determining the best solution for both fundamental and applied problems, paying attention to the characterization of nanoscale miscibility and interfaces, both in blends involving copolymers and in immiscible blends. The thermodynamics, miscibility, phase separation, morphology and interfaces in polymer blends are also discussed in light of new insights involving the nanoscopic scale. Finally, the authors detail the processing-morphology-property relationships of polymer blends, as well as the influence of processing on the generation of micro and nano morphologies, and the dependence of these morphologies on the properties of blends. Hot topics such as compatibilization through nanoparticles, miscibility of new biopolymers and nanoscale investigations of interfaces in blends are also addressed. With its application-oriented approach, handpicked selection of topics and expert contributors, this is an outstanding survey for anyone involved in the field of polymer blends for advanced technologies.
Download or read book Compendium of Polymer Terminology and Nomenclature written by Richard G Jones and published by Royal Society of Chemistry. This book was released on 2009-01-19 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: The IUPAC system of polymer nomenclature has aided the generation of unambiguous names that re ect the historical development of chemistry. However, the explosion in the circulation of information and the globalization of human activities mean that it is now necessary to have a common language for use in legal situations, patents, export-import regulations, and environmental health and safety information. Rather than recommending a ‘unique name’ for each structure, rules have been developed for assigning ‘preferred IUPAC names’, while continuing to allow alternatives in order to preserve the diversity and adaptability of nomenclature. Compendium of Polymer Terminology and Nomenclature is the only publication to collect the most important work on this subject into a single volume. It serves as a handy compendium for scientists and removes the need for time consuming literature searches. One of a series issued by the International Union of Pure and Applied Chemistry (IUPAC), it covers the terminology used in many and varied aspects of polymer science as well as the nomenclature of several di erent types of polymer including regular and irregular single-strand organic polymers, copolymers and regular double-strand (ladder and spiro) organic polymers.
Download or read book Polymer Colloids written by Rodney Priestley and published by Royal Society of Chemistry. This book was released on 2019-12-02 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: Academic and industrial research around polymer-based colloids is huge, driven both by the development of mature technologies, e.g. latexes for coatings, as well as the advancement of new materials and applications, such as building blocks for 2D/3D structures and medicine. Edited by two world-renowned leaders in polymer science and engineering, this is a fundamental text for the field. Based on a specialised course by the editors, this book provides the reader with an invaluable single source of reference. The first section describes formation, explaining basic properties of emulsions and dispersion polymerization, microfluidic approaches to produce polymer-based colloids and formation via directed self-assembly. The next section details characterisation methodologies from microscopy and small angle scattering, to surface science and simulations. The final chapters close with applications, including Pickering emulsions and molecular engineering for materials development. A comprehensive guide to polymer colloids, with contributions by leaders in their respective areas, this book is a must-have for researchers and practitioners working across polymers, soft matter and chemical and molecular engineering.
