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Author : Todd Brewster Hoitink
Publisher :
ISBN 13 :
Total Pages : 210 pages
Book Rating : 4.:/5 (831 download)
Download or read book The Structure of the Hard Segments in Thermoplastic Polyurethane Elastomers written by Todd Brewster Hoitink and published by . This book was released on 1982 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Cristina Prisacariu
Publisher : Springer Science & Business Media
ISBN 13 : 3709105145
Total Pages : 276 pages
Book Rating : 4.7/5 (91 download)
Download or read book Polyurethane Elastomers written by Cristina Prisacariu and published by Springer Science & Business Media. This book was released on 2011-07-03 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive account of the physical / mechanical behaviour of polyurethanes (PU ́s) elastomers, films and blends of variable crystallinity. Aspects covered include the elasticity and inelasticity of amorphous to crystalline PUs, in relation to their sensitivity to chemical and physical structure. A study is made of how aspects of the constitutive responses of PUs vary with composition: the polyaddition procedure, the hard segment, soft segment and chain extender (diols and diamines) are varied systematically in a large number of systems of model and novel crosslinked andthermoplastic PUs. Results will be related to: microstructural changes, on the basis of evidence from x-ray scattering (SAXS and WAXS), and also dynamic mechanical analyses (DMA), differential scanning calorimetry (DSC) and IR dichroism. Inelastic effects will be investigated also by including quantitative correlations between the magnitude of the Mullins effect and the fractional energy dissipation by hysteresis under cyclic straining, giving common relations approached by all the materials studied. A major structural feature explored is the relationship between the nature of the hard segment (crystallising or not) and that of the soft segments. Crystallinity has been sometimes observed in the commercial PUs hard phase but this is usually limited to only a few percent for most hard segment structures when solidified from the melt. One particular diisocyanate, 4,4’-dibenzyl diisocyanate (DBDI) that, in the presence of suitable chain extenders ( diols or diamines), gives rise to significant degrees of crystallinity [i-iii] and this is included in the present work. Understanding the reaction pathways involved, in resolving the subtle morphological evolution at the nanometre level, and capturing mathematically the complex, large-deformation nonlinear viscoelastic mechanical behaviour are assumed to bring new important insights in the world basic research in polyurethanes and towards applied industrial research in this area.
Author : C. Hepburn
Publisher : Springer Science & Business Media
ISBN 13 : 940112924X
Total Pages : 458 pages
Book Rating : 4.4/5 (11 download)
Download or read book Polyurethane Elastomers written by C. Hepburn and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this monograph has been to distil into a single volume, in an easily read and assimilated format, the essentials of this often complex technology such that it is usable by all technical and semi-technical people who wish to become their own polyurethane and polyurethane elastomer expert.
Author : J. A. Brydson
Publisher : iSmithers Rapra Publishing
ISBN 13 : 9781859570449
Total Pages : 120 pages
Book Rating : 4.5/5 (74 download)
Download or read book Thermoplastic Elastomers written by J. A. Brydson and published by iSmithers Rapra Publishing. This book was released on 1995 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: The nature and general properties of TPE's are explained, and the classes of materials considered in turn include styrenic block copolymers, polyether-esters, polyamides, polyurethanes, polyolefins and other miscellaneous systems. Developments in specific market sectors are also outlined. The review is supported by an extensive References and Abstracts section, containing over 400 abstracts, which provide a great deal more information on these useful materials.
Author : Brigitta Schemmer
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (16 download)
Download or read book Thermoplastic Polyurethane Elastomers with Aliphatic Hard Segments Based on Plant-Oil-Derived Long-Chain Diisocyanates written by Brigitta Schemmer and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kristen Nicole Rohm
Publisher :
ISBN 13 :
Total Pages : 212 pages
Book Rating : 4.:/5 (129 download)
Download or read book Thermoplastic Polyurethane written by Kristen Nicole Rohm and published by . This book was released on 2021 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: The step polymerization reaction between diisocyanates and diols results in a tremendously functional material with wide-ranging applications including medical devices and sealants, known as thermoplastic polyurethane (TPU). The microphase separation of urethane-rich hard segments (HS) and hydrocarbon soft segments (SS) provide TPU with the unique morphology responsible for its elastomeric properties. The structure-property relationships of TPU have been understood in terms of either a rubber-like material where HS-rich regions act as crosslink points or a nanocomposite where hard regions are the reinforcing agent. In both views, attempts to model the mechanical behavior based on morphology are hampered by the difficulty in determining parameters that describe the morphology from the chemical composition. The distribution of HS block length and the attractive hydrogen bonding forces make predicting the morphology using block co-polymer theory imprecise, especially for low HS content (HSC) TPUs. Furthermore, TPU has typically been viewed as a binary system with a hard phase dictated by the HSC and a soft phase whose properties are only dependent on the diol type and molecular weight. The first part of this thesis challenges the binary view of TPU through an experimental and modeling investigation. An analytical micromechanical model, the Eshelby double inclusion model, was used to evaluate the observed mechanical behavior of a series of polyester TPUs with increasing HSC, a series of polyether TPUs softened by triols in the SS, and a series of polyester TPUs softened by triol chain extenders. The model was used to probe the mechanical reinforcement contribution from morphological parameters. The TPU morphology was modeled as a composite of HS-rich "hard particles" and a SS-rich "soft matrix", with the necessity of a third, intermediary phase, the "interphase" evaluated based on experimental results. The second part of the thesis goes beyond neat TPU by preparing multi-material TPU composites for improved functionality. The processing-property relationships of TPU composites with graphite, graphene, and polytetrafluoroethylene are investigated. The importance of the secondary phase's aspect ratio, dispersion, and interfacial area are discussed in the context of different processing techniques including in situ polymerization and batch mixing and for their value as solid lubricants.
Author : Stoyko Fakirov
Publisher : John Wiley & Sons
ISBN 13 : 3527606890
Total Pages : 643 pages
Book Rating : 4.5/5 (276 download)
Download or read book Handbook of Condensation Thermoplastic Elastomers written by Stoyko Fakirov and published by John Wiley & Sons. This book was released on 2006-05-12 with total page 643 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reporting on the work of an international team of scientists actively involved in the study of thermoplastic elastomers (TPE) based on polyesters, polyamides, and polyurethanes, this book is the first to provide a detailed description of condensation TPE with close attention paid to polyamide-based systems. Reflecting the increasing importance of TPE as engineering plastics, the authors discuss the widened application opportunities by preparing systems with various chemical compositions and molecular structures as (semi-) interpenetrating networks. The contents also cover the chemical aspects, physical structure and properties, life cycle assessment, and recycling possibilities as well as such unique "smart" properties like the shape memory effect of the three classes of thermoplastic elastomers.
Author : Günter Scholz
Publisher : Walter de Gruyter GmbH & Co KG
ISBN 13 : 3110739844
Total Pages : 109 pages
Book Rating : 4.1/5 (17 download)
Download or read book Thermoplastic Elastomers written by Günter Scholz and published by Walter de Gruyter GmbH & Co KG. This book was released on 2021-08-02 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book provides a qualified and fast view into the world of TPE including the difference to rubber materials. It describes their classification as they are presented in the market, characterization, manufacturing, processing and behavior. Aside from the self-learning option, it is a companion to seminars and studies about elastomers.
Author : Anil K. Bhowmick
Publisher : CRC Press
ISBN 13 : 1482270366
Total Pages : 941 pages
Book Rating : 4.4/5 (822 download)
Download or read book Handbook of Elastomers written by Anil K. Bhowmick and published by CRC Press. This book was released on 2000-11-02 with total page 941 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides the latest authoritative research on the developments, technology, and applications of rubbery materials. Presents structures, manufacturing techniques, and processing details for natural and synthetic rubbers, rubber-blends, rubber composites, and thermoplastic elastomers. 80% revised and rewritten material covers major advances since publication of the previous edition.
Author : Michael Szycher, Ph.D
Publisher : CRC Press
ISBN 13 : 1439839581
Total Pages : 1147 pages
Book Rating : 4.4/5 (398 download)
Download or read book Szycher's Handbook of Polyurethanes, Second Edition written by Michael Szycher, Ph.D and published by CRC Press. This book was released on 2012-07-13 with total page 1147 pages. Available in PDF, EPUB and Kindle. Book excerpt: A practical handbook rather than merely a chemistry reference, Szycher's Handbook of Polyurethanes, Second Edition offers an easy-to-follow compilation of crucial new information on polyurethane technology, which is irreplaceable in a wide range of applications. This new edition of a bestseller is an invaluable reference for technologists, marketers, suppliers, and academicians who require cutting-edge, commercially valuable data on the most advanced uses for polyurethane, one of the most important and complex specialty polymers. internationally recognized expert Dr. Michael Szycher updates his bestselling industry "bible" With seven entirely new chapters and five that are revised and updated, this book summarizes vital contents from U.S. patent literature—one of the most comprehensive sources of up-to-date technical information. These patents illustrate the most useful technology discovered by corporations, universities, and independent inventors. Because of the wealth of information they contain, this handbook features many full-text patents, which are carefully selected to best illustrate the complex principles involved in polyurethane chemistry and technology. Features of this landmark reference include: Hundreds of practical formulations Discussion of the polyurethane history, key terms, and commercial importance An in-depth survey of patent literature Useful stoichiometric calculations The latest "green" chemistry applications A complete assessment of medical-grade polyurethane technology Not biased toward any one supplier’s expertise, this special reference uses a simplified language and layout and provides extensive study questions after each chapter. It presents rich technical and historical descriptions of all major polyurethanes and updated sections on medical and biological applications. These features help readers better understand developmental, chemical, application, and commercial aspects of the subject.
Author : Olagoke Olabisi
Publisher : CRC Press
ISBN 13 : 1466577231
Total Pages : 976 pages
Book Rating : 4.4/5 (665 download)
Download or read book Handbook of Thermoplastics written by Olagoke Olabisi and published by CRC Press. This book was released on 2016-02-03 with total page 976 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition of the bestselling Handbook of Thermoplastics incorporates recent developments and advances in thermoplastics with regard to materials development, processing, properties, and applications. With contributions from 65 internationally recognized authorities in the field, the second edition features new and updated discussions of seve
Author : Jiri George Drobny
Publisher : Elsevier
ISBN 13 : 0323221688
Total Pages : 465 pages
Book Rating : 4.3/5 (232 download)
Download or read book Handbook of Thermoplastic Elastomers written by Jiri George Drobny and published by Elsevier. This book was released on 2014-05-30 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Thermoplastic Elastomers, Second Edition presents a comprehensive working knowledge of thermoplastic elastomers (TPEs), providing an essential introduction for those learning the basics, but also detailed engineering data and best practice guidance for those already involved in polymerization, processing, and part manufacture. TPEs use short, cost-effective production cycles, with reduced energy consumption compared to other polymers, and are used in a range of industries including automotive, medical, construction and many more. This handbook provides all the practical information engineers need to successfully utilize this material group in their products, as well as the required knowledge to thoroughly ground themselves in the fundamental chemistry of TPEs. The data tables included in this book assist engineers and scientists in both selecting and processing the materials for a given product or application. In the second edition of this handbook, all chapters have been reviewed and updated. New polymers and applications have been added — particularly in the growing automotive and medical fields — and changes in chemistry and processing technology are covered. Provides essential knowledge of the chemistry, processing, properties, and applications for both new and established technical professionals in any industry utilizing TPEs Datasheets provide "at-a-glance" processing and technical information for a wide range of commercial TPEs and compounds, saving readers the need to contact suppliers Includes data on additional materials and applications, particularly in automotive and medical industries
Author : John Blackwell
Publisher :
ISBN 13 :
Total Pages : 23 pages
Book Rating : 4.:/5 (227 download)
Download or read book The Structure of Polyurethane Elastomers written by John Blackwell and published by . This book was released on 1983 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyurethane elastomers derive their properties from phase separation into hard (urethane) and soft (polyether or polyester) domains. We have used x-ray diffraction and conformational analysis to determine the structure of the hard domains in MDI/diol/polyester polyurethanes. A new structure has been developed for MDI/butandiol (C4) hard segments, based on the following approaches. Solution of structures of two MDI derivatives showed the basic features of the polymer conformation, packing, and hydrogen bonding. Better quality x-ray patterns allowed determination of the unit cell. Potential energy conformational analysis was applied to polyurethanes for the first time. The results point to a fully extended poly(MDI/butandiol) chain linked to its neighbors in a stabillizing two-dimensional hydrogen bonding network. This work was expanded to the polyurethanes prepared using the C2-C8 homologous series of diols. The even diol series (except C2) adopt fully extended structures like that for the C4 polymer. In contrast the odd diol series adopt higher energy contracted conformations, probably in order to form intermolecular hydrogen bonds.
Author : James E. Mark
Publisher : Elsevier
ISBN 13 : 0080456014
Total Pages : 762 pages
Book Rating : 4.0/5 (84 download)
Download or read book Science and Technology of Rubber written by James E. Mark and published by Elsevier. This book was released on 2011-07-28 with total page 762 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Science and Technology of Rubber, Third Edition provides a broad survey of elastomers with special emphasis on materials with a rubber-like elasticity. As in the 2nd edition, the emphasis remains on a unified treatment of the material; exploring topics from the chemical aspects such as elastomer synthesis and curing, through recent theoretical developments and characterization of equilibrium and dynamic properties, to the final applications of rubber, including tire engineering and manufacturing. Many advances have been made in polymer and elastomers research over the past ten years since the 2nd edition was published. Updated material stresses the continuous relationship between the ongoing research in synthesis, physics, structure and mechanics of rubber technology and industrial applications. Special attention is paid to recent advances in rubber-like elasticity theory and new processing techniques for elastomers. This new edition is comprised of 20% new material, including a new chapter on environmental issues and tire recycling.
Author : Chapal Kumar Das
Publisher : BoD – Books on Demand
ISBN 13 : 9535122231
Total Pages : 180 pages
Book Rating : 4.5/5 (351 download)
Download or read book Thermoplastic Elastomers written by Chapal Kumar Das and published by BoD – Books on Demand. This book was released on 2015-11-26 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermoplastic elastomers (TPEs), commonly known as thermoplastic rubbers, are a category of copolymers having thermoplastic and elastomeric characteristics. A TPE is a rubbery material with properties very close to those of conventional vulcanized rubber at normal conditions. It can be processed in a molten state even at elevated temperatures. TPEs show advantages typical of both rubbery materials and plastic materials. TPEs are a class of polymers bridging between the service properties of elastomers and the processing properties of thermoplastics. Nowadays, the best use of thermoplastics is in the field of biomedical applications, starting from artificial skin to many of the artificial human body parts. Apart from these, thermoplastic elastomers are being used for drug encapsulation purposes, and since they are biocompatible in many cases, their scope of applications has been broadened in the biotechnological field as well. The present book highlights many biological and biomedical applications of TPEs from which the broader area readers will benefit.
Author : Ram K. Gupta
Publisher :
ISBN 13 : 9780841298408
Total Pages : pages
Book Rating : 4.2/5 (984 download)
Download or read book Polyurethane Chemistry written by Ram K. Gupta and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book is about Polyurethane Chemistry: Renewable Polyols and Isocyanates"--
Author : Chun-Sheng Wang
Publisher :
ISBN 13 :
Total Pages : 122 pages
Book Rating : 4.:/5 (278 download)
Download or read book Effect of Hard Segments on Morphology and Properties of Thermoplastic Polyurethanes written by Chun-Sheng Wang and published by . This book was released on 1992 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
