Chemical Characterisation Of Polyurethanes

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Chemical Characterisation Of Polyurethanes

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Author : M. J. Forrest
language : en
Publisher: iSmithers Rapra Publishing
Release Date : 1999

Chemical Characterisation Of Polyurethanes written by M. J. Forrest and has been published by iSmithers Rapra Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Technology & Engineering categories.

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.

Eco Friendly Waterborne Polyurethanes

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Author : Ram K. Gupta
language : en
Publisher: CRC Press
Release Date : 2022-01-25

Eco Friendly Waterborne Polyurethanes written by Ram K. Gupta and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-01-25 with Technology & Engineering categories.

The polyurethane industry is among the fastest growing, with polyurethanes used in consumer as well as industrial sectors. Waterborne polyurethanes (WPUs) exhibit many advantages over conventional volatile organic compounds (VOCs) based polyurethanes and have emerged as an environmentally friendly alternative. WPUs offer an opportunity to use sustainable raw materials to produce environmentally sustainable polymers, particularly, polyols derived from vegetable oils. Eco-Friendly Waterborne Polyurethanes: Synthesis, Properties, and Applications provides state-of-the-art knowledge of the synthesis, application, and property enhancement of WPUs. Covers various types of eco-friendly materials and technologies used to synthesize WPUs Presents an overview and applications of WPUs in several advanced research areas Provides fundamentals of synthetic processes and their chemistries for specific applications Elaborates on advanced approaches used to convert renewable resources into polymers Offers new direction to scientists, researchers, and students to better understand the chemistry, technologies, and applications Written for polymer chemists, materials scientists, and other researchers and industry, this book serves as a comprehensive reference for readers interested in the development and application of sustainable polymers.

Functional Polyurethanes In Memory Of Prof J Zsef Karger Kocsis

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Author : Sándor Kéki
language : en
Publisher: MDPI
Release Date : 2020-04-01

Functional Polyurethanes In Memory Of Prof J Zsef Karger Kocsis written by Sándor Kéki and has been published by MDPI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-04-01 with Technology & Engineering categories.

This book is a collection of 22 per-reviewed scientific papers on the synthesis and characterization of polyurethanes with special chemical and physical properties. In our "plastic age", polyurethanes are one of the most versatile polymers with broad and excellent mechanical and chemical properties. These polyurethanes can be found in many areas of our every day`s life ranging from insulators through hard and soft foams to various biomedical devices. The huge number of possible variations in the types of reactants allows the scientists to design and tailor the properties of polyurethanes to specific needs. The fascinating chemistry and materials science of polyurethanes have attracted interests of many scientists. As a result, the progress in this field made by these scholars are summarized in this book with special emphasizes on the structure-property relationships and biomedical applications of polyurethanes as well as their environmental aspects are also highlighted in some papers. Thus, this collection of papers is recommended to all readers who are interested not only in the synthesis and properties of polyurethanes but want to be familiar with the theoretical description of their formation as well.

Polyurethane Elastomers

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Author : Cristina Prisacariu
language : en
Publisher: Springer Science & Business Media
Release Date : 2011-07-03

Polyurethane Elastomers written by Cristina Prisacariu and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-07-03 with Technology & Engineering categories.

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.

Chemistry And Technology Of Polyols For Polyurethanes

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Author : Mihail Ionescu
language : en
Publisher: iSmithers Rapra Publishing
Release Date : 2005

Chemistry And Technology Of Polyols For Polyurethanes written by Mihail Ionescu and has been published by iSmithers Rapra Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Science categories.

This book considers the raw materials used to build the polyurethane polymeric architecture. It covers the chemistry and technology of oligo-polyol fabrication, the characteristics of the various oligo-polyol families and the effects of the oligo-polyol structure on the properties of the resulting polyurethane. It presents the details of oligo-polyol synthesis, and explains the chemical and physico-chemical subtleties of oligo-polyol fabrication. This book will be of interest to all specialists working with polyols for the manufacture of polyurethanes and to all researchers that would like to know more about polyol chemistry.

Chemical Characterization Of Cross Linked Polyurethane Films

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Author : RR. Lamping
language : en
Publisher:
Release Date : 1992

Chemical Characterization Of Cross Linked Polyurethane Films written by RR. Lamping and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Coating categories.

The chemical composition and the physical properties of two-component polyurethane coatings are influenced by the curing conditions, viz. relative humidity and temperature. Apart from the formation of urethane, carbon dioxide can be released by hydrolysis of the isocyanate groups, leading to the formation of urea groups.

Advances In Polyurethane Biomaterials

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Author : Stuart L. Cooper
language : en
Publisher: Woodhead Publishing
Release Date : 2016-01-23

Advances In Polyurethane Biomaterials written by Stuart L. Cooper and has been published by Woodhead Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-01-23 with Medical categories.

Advances in Polyurethane Biomaterials brings together a thorough review of advances in the properties and applications of polyurethanes for biomedical applications. The first set of chapters in the book provides an important overview of the fundamentals of this material with chapters on properties and processing methods for polyurethane. Further sections cover significant uses such as their tissue engineering and vascular and drug delivery applications Written by an international team of leading authors, the book is a comprehensive and essential reference on this important biomaterial. Brings together in-depth coverage of an important material, essential for many advanced biomedical applications Connects the fundamentals of polyurethanes with state-of-the-art analysis of significant new applications, including tissue engineering and drug delivery Written by a team of highly knowledgeable authors with a range of professional and academic experience, overseen by an editor who is a leading expert in the field

Linear Polyurethanes

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Author : Piotr Krol
language : en
Publisher: CRC Press
Release Date : 2008-03-27

Linear Polyurethanes written by Piotr Krol and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-03-27 with Science categories.

This volume describes in detail the mechanisms of the diisocyanates and polyols polyaddition process as well as its kinetic and process aspects important for obtaining linear polyurethanes. General kinetics of the process and its experimental verification, using GPC chromatography as well as NMR spectroscopy and MALDI-ToF spectrometry, are presente

Polyurethanes

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Author : Mark F. Sonnenschein
language : en
Publisher: John Wiley & Sons
Release Date : 2021-01-20

Polyurethanes written by Mark F. Sonnenschein and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-01-20 with Technology & Engineering categories.

This book, cohesively written by an expert author with supreme breadth and depth of perspective on polyurethanes, provides a comprehensive overview of all aspects of the science and technology on one of the most commonly produced plastics. Covers the applications, manufacture, and markets for polyurethanes, and discusses analytical methods, reaction mechanisms, morphology, and synthetic routes Provides an up-to-date view of the current markets and trend analysis based on patent activity and updates chapters to include new research Includes two new chapters on PU recycling and PU hybrids, covering the opportunities and challenges in both

Polyurethanes

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Author : Leslie Nathan Phillips
language : en
Publisher:
Release Date : 1964

Polyurethanes written by Leslie Nathan Phillips and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with Polyurethanes categories.