Download or read book Investigation of the Physical Properties and Morphology of Polyurethane Elastomers written by Monica A. Pocol and published by . This book was released on 1999 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
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.
Download or read book Study of Cure and Morphology mechanical Properties of Polyurethane Thin Film Elastomers written by Lorna D. Crosthwaite and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Morphology and Fatigue Properties of Polyurethane Thermoplastic Elastomers written by Craig Wayne Stephen Myers and published by . This book was released on 1993 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyurethane thermoplastic elastomers are segmented block polymers consisting of rubbery "soft" blocks and glassy or semi-crystalline "hard" blocks. Thermodynamic incompatibility between the soft and hard blocks causes the formation of a microdomain morphology which imparts elastomeric properties to the material. Despite their commercial importance, the response of these materials to repeated cyclic loading (fatigue) has not been well studied. This work is devoted to achieving a more detailed understanding of the chemical and morphological factors which govern fatigue behavior in polyurethane thermoplastic elastomers.
Download or read book Elastomers written by Nevin Çankaya and published by BoD – Books on Demand. This book was released on 2017-08-30 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary-Book Contents: Your purpose of reading this book is to concentrate on recent developments on elastomers. The articles collected in this book are contributions by invited researchers with a long-standing experience in different research areas. I hope that the material presented here is understandable to a broad audience, not only scientists but also people with many different disciplines. The book contains eleven chapters in two sections: (1) "Mechanical Properties of Elastomers" and (2) "Elastomers for Natural and Medical Applications." The book provides detailed and current reviews in these different areas written by experts in their respective fields. This book will be useful for polymer workers and other scientists alike and will contribute to the training of current and future researchers, academics, PhD students, and other scientists.
Download or read book A Study of Mechanical Properties and Morphology of Aramid Short Fibres thermoplastic Polyurethane Elastomer Composities written by Chanthipa Vajrasthira and published by . This book was released on 2000 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polyurethane Polymers Composites and Nanocomposites written by Sabu Thomas and published by Elsevier. This book was released on 2017-08-17 with total page 635 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyurethane Polymers: Composites and Nanocomposites concentrates on the composites and nanocomposites of polyurethane based materials. Polyurethane composites are a very important class of materials widely used in the biomedical and industrial field that offer numerous potential applications in many areas. This book discusses current research and identifies future research needs in the area. Provides an elaborate coverage of the chemistry of polyurethane, its synthesis, and properties Includes available characterization techniques Relates types of polyurethanes to their potential properties Discusses composites, nanocomposites options, and PU recycling
Download or read book Castable Polyurethane Elastomers written by I.R. Clemitson and published by CRC Press. This book was released on 2015-05-13 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second edition of a bestseller is a practical guide to the production of castable polyurethane articles. The book shows the progression from raw materials to prepolymer production, including the chemistry and functionality of the processes. It provides a comprehensive look at various problem-solving and processing techniques, examining the selection of different systems on both the micro and macro levels. Reorganized for better flow, this edition describes new processing methods, expands coverage of health and safety aspects, and brings all standards up to date.
Download or read book Structure Properties and Morphology Relationships of Polyurethane Elastomers Based on Urethane Amide and Urea Diols written by Lung-Turn Chen and published by . This book was released on 1987 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polyurethane Polymers Blends and Interpenetrating Polymer Networks written by Sabu Thomas and published by Elsevier. This book was released on 2017-08-15 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyurethane Polymers: Blends and Interpenetrating Networks deals with almost all aspects of blends and IPNs formed by polyurethane, including the thermal, mechanical, morphological, and viscoelastic properties of each blend presented in the book. In addition, major applications related to these blends and IPNs are mentioned. Provides an elaborate coverage of the chemistry of polyurethane, including its synthesis and properties Includes available characterization techniques Relates types of polyurethanes to their potential properties Discusses blends options
Download or read book A Study of Morphology wear Relationships in Thermoplastic Polyurethane Elastomers written by James Ivan Mardel and published by . This book was released on 1996 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Relationships Between Polyurethane Elastomer Structure and Ageing Properties Part 3 Effective Crosslink Structure written by and published by . This book was released on 1971 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of varying chemical group structure on the properties of polyurethane elastomers has been investigated. The introduction of urea and biuret groups into polyester and polyether urethanes by the use of 4,4'- methylene bis-(2-chloroaniline), MOCA, yielded elastomers with superior physical properties to elastomers which contained predominantly urethane groups and were chain extended and/or crosslinked with diols and triols. The ageing properties of polyurethane elastomers cured with blends of MOCA and 1,1'1''-trimethylol propane (TMP) were equal to elastomers in which MOCA or TMP were the sole curing agents.
Download or read book Chemical Characterisation of Polyurethanes written by M. J. Forrest and published by iSmithers Rapra Publishing. This book was released on 1999 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: This review aims to introduce the chemistry of polyurethanes, and to examine the different techniques which may be used to analyse these polymers. The characterisation of polyurethane starting materials, cure reaction, polymer structures and molecular c099, and additives, and their relationship to the final properties of the polymer are all outlined. An additional indexed section containing several hundred abstracts from the Rapra Polymer Library database gives useful references for further reading.
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.
Download or read book In situ Small Angle X ray Scattering Investigation of Transient Nanostructure of Multi phase Polymer Materials Under Mechanical Deformation written by Ahmad Zeinolebadi and published by Springer Science & Business Media. This book was released on 2013-01-30 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results in this dissertation set the ground to answer a fundamental question in data-driven polymer material science: "Why don't prepared composites show less fatigue than the pure plastics?" A simultaneous analysis of mechanical testing and small angle X-Ray scattering from the DESY source in Hamburg has been applied to approach this question, which is also central to the European research project "Nanotough", and the results are clearly presented in this book. The evolution of the materials structure is visualized and quantitatively analyzed from exhaustive sequences of scattering images. Three different classes of polymer composites are presented as typical and illustrative examples. The obtained results illustrate that the interactions of their components can cause unpredictable structural effects, ultimaltely leading to a weakening of the material, where a reinforcement was expected.
Download or read book An Evaluation of the Physical Properties of Polyurethane Elastomer for Somatoprostheses written by James F. Bigalke and published by . This book was released on 1973 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
