Download or read book Rigid Polymer Networks written by Shaul M. Aharoni and published by . This book was released on 1994 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume of the series gives an overview on Rigid Polymer Networks written by two reputed experts in the field. A broad range of densely-branched, highly-crosslinked aromatic networks and gels of increasing rigidity are discussed, with special emphasis on aromatic rigid liquid-crystal polymer networks. The synthetic procedures to create the networks are briefly described and extensively referenced. Features of one-step and two-step rigid networks in their pre-gel and post-gel states are discussed. Some first steps are then taken in the theoretical treatment of LCP networks with long aromatic segments of decreasing stiffness. The current state of theory dealing with the broader class of highly-crosslinked rigid aromatic networks and gels is finally mentioned.
Download or read book Rigid Polymer Networks written by S.M. Aharoni and published by Springer. This book was released on 2013-10-03 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume of the series gives an overview on Rigid Polymer Networks written by two reputed experts in the field. A broad range of densely-branched, highly-crosslinked aromatic networks and gels of increasing rigidity are discussed, with special emphasis on aromatic rigid liquid-crystal polymer networks. The synthetic procedures to create the networks are briefly described and extensively referenced. Features of one-step and two-step rigid networks in their pre-gel and post-gel states are discussed. Some first steps are then taken in the theoretical treatment of LCP networks with long aromatic segments of decreasing stiffness. The current state of theory dealing with the broader class of highly-crosslinked rigid aromatic networks and gels is finally mentioned.
Download or read book Cross Linked Liquid Crystalline Systems written by Dirk Broer and published by CRC Press. This book was released on 2011-01-24 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: Liquid crystal displays were discovered in the 1960s, and today we continue to enjoy the benefits of that fundamental discovery and its translation into a wide variety of products. Like liquid crystals, polymers are unusual materials, and have similarly enjoyed a great deal of research attention because of their vast applications and uses and compl
Download or read book Advances in Polymer Science Volume 118 Rigid Polymer Networks written by Abe A Ed and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis Characterization and Theory of Polymeric Networks and Gels written by Shaul M. Aharoni and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer science is a technology-driven science. More often than not, technological breakthroughs opened the gates to rapid fundamental and theoretical advances, dramatically broadening the understanding of experimental observations, and expanding the science itself. Some of the breakthroughs involved the creation of new materials. Among these one may enumerate the vulcanization of natural rubber, the derivatization of cellulose, the giant advances right before and during World War II in the preparation and characterization of synthetic elastomers and semi crystalline polymers such as polyesters and polyamides, the subsequent creation of aromatic high-temperature resistant amorphous and semi-crystal line polymers, and the more recent development of liquid-crystalline polymers mostly with n~in-chain mesogenicity. other breakthroughs involve the development of powerful characterization techniques. Among the recent ones, the photon correlation spectroscopy owes its success to the advent of laser technology, small angle neutron scattering evolved from n~clear reactors technology, and modern solid-state nuclear magnetic resonance spectroscopy exists because of advances in superconductivity. The growing need for high modulus, high-temperature resistant polymers is opening at present a new technology, that of more or less rigid networks. The use of such networks is rapidly growing in applications where they are used as such or where they serve as matrices for fibers or other load bearing elements. The rigid networks are largely aromatic. Many of them are prepared from multifunctional wholly or almost-wholly aromatic kernels, while others contain large amount of stiff difunctional residus leading to the presence of many main-chain "liquid-crystalline" segments in the "infinite" network.
Download or read book Part I Syntheses Characterizations and Properties of Semi rigid Polymer Networks written by Wenyan Zhao and published by . This book was released on 1995 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies Directed Towards the Synthesis and Characterisation of Rigid Rod Polymer Networks written by Sara Morag Southern and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Characterization of Rigid Polymer Systems written by Cory J. Ruud and published by . This book was released on 1999 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Micro and Nano Structured Interpenetrating Polymer Networks written by Sabu Thomas and published by John Wiley & Sons. This book was released on 2016-03-08 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines the current state of the art, new challenges, opportunities, and applications of IPNs. With contributions from experts across the globe, this survey is an outstanding resource reference for anyone involved in the field of polymer materials design for advanced technologies. • Comprehensively summarizes many of the recent technical research accomplishments in the area of micro and nanostructured Interpenetrating Polymer Networks • Discusses various aspects of synthesis, characterization, structure, morphology, modelling, properties, and applications of IPNs • Describes how nano-structured IPNs correlate their multiscale structure to their properties and morphologies • Serves as a one-stop reference resource for important research accomplishments in the area of IPNs and nano-structured polymer systems • Includes chapters from leading researchers in the IPN field from industry, academy, government and private research institutions
Download or read book Biological and Synthetic Polymer Networks written by O. Kramer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biological and Synthetic Polymer Networks contains 36 papers selected from the papers presented at NETWORKS 86, the 8th Polymer Networks Group Meeting. NETWORKS 86 was held in Elsinore, Denmark, on 31 August 5 September 1986. A total of nine invited main lectures and 68 contributed papers were presented at the meeting. A wide range of important biological and synthetic materials consist of three-dimensional polymer networks. The properties range from very stiff structural materials to extremely flexible rubbery materials and gels. Most polymer networks are permanent networks held together by covalent bonds. Such networks are insoluble but they may swell considerably in good solvents. Polymer networks held together by ionic bonds, hydrogen bonds or so-called entanglements are of a more temporary nature. At long times they exhibit a tendency to flow, and they are soluble in good solvents. The paper by Professor Walther Burchard and his co-workers, 'Covalent, Thermoreversible and Entangled Networks: An Attempt at Comparison', serves as a general introduction to polymer networks. The book contains both theoretical and experimental papers on the formation, characterisation and properties of polymer networks. Two topics were given special sessions at the meeting, namely Biological Networks and Swelling of Polymer Networks.
Download or read book Interpenetrating Polymer Networks written by Laura Lee Iverson and published by . This book was released on 1996 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molecular Basis of Polymer Networks written by Artur Baumgärtner and published by Springer. This book was released on 1989-11-16 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: The workshop on the "Molecular Basis of Polymer Networks", held October 5- 7, 1988 in 1iilich, FRG, continued a series of workshops jointly organized by the Institute Laue Langevin (ILL) in Grenoble, and the Institute of Solid State Physics of the KFA, 1iilich. The aim of this workshop was to provide a platform for discussions between theoreticians and experimentalists interested in the physics of polymer networks, in the hope that the two types of discussion would be synergistic. As revealed by the title of this workshop, the main focus of the lectures was on molecular aspects of the problem. The individual parts of these proceedings cover various approaches. Following quite general comments from a physicist examining the situation from "outside", various new theoretical concepts are developed. During the last decade the advent of Small Angle Neutron Scattering (SANS) has allowed the molecular structure of polymer networks to be studied and thus the reliability of the theories to be tested directly at the molecular level. Recent advances in this field are presented. The use of new techniques such as 2H NMR or QELS and the refinements of more classical, mechanical experimental measure ments have provided new information about the relation between the macroscopic behavior and the microscopic structure of polymer networks. Some recent results in this area are discussed for both chemically cross-linked networks and gels built by specific interchain interactions.
Download or read book Polymer Characterization written by Karel Dusˇek and published by Springer Science & Business Media. This book was released on 2010-08-07 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: -Shear-Induced Transitions and Instabilities in Surfactant Wormlike Micelles By S. Lerouge, J.-F. Berret -Laser-Interferometric Creep Rate Spectroscopy of Polymers By V. A. Bershtein, P. N. Yakushev -Polymer Nanocomposites for Electro-Optics: Perspectives on Processing Technologies, Material Characterization, and Future Application K. Matras-Postolek, D. Bogdal
Download or read book Polymer Networks written by Hassan Masoud and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer networks are an important class of materials that are ubiquitously found in natural, biological, and man-made systems. The complex mesoscale structure of these soft materials has made it difficult for researchers to fully explore their properties. In this dissertation, we introduce a coarse-grained computational model for permanently cross-linked polymer networks than can properly capture common properties of these materials. We use this model to study several practical problems involving dry and solvated networks. Specifically, we analyze the permeability and diffusivity of polymer networks under mechanical deformations, we examine the release of encapsulated solutes from microgel capsules during volume transitions, and we explore the complex tribological behavior of elastomers. Our simulations reveal that the network transport properties are defined by the network porosity and by the degree of network anisotropy due to mechanical deformations. In particular, the permeability of mechanically deformed networks can be predicted based on the alignment of network filaments that is characterized by a second order orientation tensor. Moreover, our numerical calculations demonstrate that responsive microcapsules can be effectively utilized for steady and pulsatile release of encapsulated solutes. We show that swollen gel capsules allow steady, diffusive release of nanoparticles and polymer chains, whereas gel deswelling causes burst-like discharge of solutes driven by an outward flow of the solvent initially enclosed within a shrinking capsule. We further demonstrate that this hydrodynamic release can be regulated by introducing rigid microscopic rods in the capsule interior. We also probe the effects of velocity, temperature, and normal load on the sliding of elastomers on smooth and corrugated substrates. Our friction simulations predict a bell-shaped curve for the dependence of the friction coefficient on the sliding velocity. Our simulations also illustrate that at low sliding velocities, the friction decreases with an increase in the temperature. Overall, our findings improve the current understanding of the behavior of polymer networks in equilibrium and non-equilibrium conditions, which has important implications for synthesizing new drug delivery agents, designing tissue engineering systems, and developing novel methods for controlling the friction of elastomers.
Download or read book Liquid Crystal Elastomers written by Mark Warner and published by Oxford University Press. This book was released on 2007-04-05 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text is a primer for liquid crystals, polymers, rubber and elasticity. It is directed at physicists, chemists, material scientists, engineers and applied mathematicians at the graduate student level and beyond.
Download or read book Force Responsive Networks written by K. P. Sonu and published by American Chemical Society. This book was released on 2024-05-06 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: This primer provides a precise, high‐level overview of force-responsive networks with practical examples and well-crafted diagrams, fostering a deeper understanding of the subject matter. Force‐responsive networks combine chemistry, polymer science, physics, and mechanical engineering into this interdisciplinary domain. By bridging diverse fields, the primer broadens the academic horizon and highlights the synergistic potential inherent in the intersection of these areas. The authors employ plain language to elucidate complex concepts and cover many basic principles in force‐responsive polymer networks. This primer is well‐suited for senior undergraduate and junior graduate students. It is an ideal reference for advanced materials and engineering classes and is particularly beneficial for students beginning research in force‐responsive materials. Additionally, it offers in‐depth insight into the advanced features of the mechanical properties of polymeric materials.
Download or read book Polymers and Other Advanced Materials written by Ting Joo Fai and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 770 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the Third International Conference on Frontiers of Polymers and Advanced Materials held in Kuala Lumpur, Malaysia, January 16-20, 1995
