Download or read book The Effect of Strain on the Morphology and Mechanical Properties of Thermoplastic Polyurethane Elastomers TPEs written by Dawn Marie Crawford and published by . This book was released on 1997 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research discussed herein entails an investigation of the effect of strain on polymer morphology. Model thermoplastic polyurethane elastomers (TPEs) were subjected to tensile strains between 100% and 400% elongation and aged for varying lengths of time at ambient and elevated temperature. Differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) were used to investigate the changes in morphology that occurred as a result of strain elongation. The effect of aging was also related to the TPE's mechanical properties such as abrasion resistance. DSC results indicate that the polymer undergoes morphology changes due to strain, resulting in some degree of phase mixing. DMA data suggest that strain aging causes a minor change in the glass transition temperature (Tg) but a significant change in the peak magnitude of E" and tan delta.
Download or read book The Effect of Strain on the Morphology and Mechanical Properties of Thermoplastic Polyurethane Elastomers TPEs written by Dawn Marie Crawford and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research discussed herein entails an investigation of the effect of strain on polymer morphology. Model thermoplastic polyurethane elastomers (TPEs) were subjected to tensile strains between 100% and 400% elongation and aged for varying lengths of time at ambient and elevated temperature. Differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) were used to investigate the changes in morphology that occurred as a result of strain elongation. The effect of aging was also related to the TPE's mechanical properties such as abrasion resistance. DSC results indicate that the polymer undergoes morphology changes due to strain, resulting in some degree of phase mixing. DMA data suggest that strain aging causes a minor change in the glass transition temperature (Tg) but a significant change in the peak magnitude of E" and tan delta.
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 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 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
Download or read book Environmentally Compatible Food Packaging written by E. Chiellini and published by Elsevier. This book was released on 2008-07-24 with total page 591 pages. Available in PDF, EPUB and Kindle. Book excerpt: Food packaging performs an essential function, but packaging materials can have a negative impact on the environment. This collection reviews bio-based, biodegradable and recycled materials and their current and potential applications for food protection and preservation.The first part of the book looks at the latest advances in bio-based food packaging materials. Part two discusses the factors involved in choosing alternative packaging materials such as consumer preference, measuring the environmental performance of food packaging, eco-design, and the safety and quality of recycled materials. Part three contains chapters on the applications of environmentally-compatible materials in particular product sectors, including the packaging of fresh horticultural produce, dairy products and seafood. This section also covers active packaging, modified atmosphere packaging and biobased intelligent food packaging. The book finishes with a summary of the legislation and certification of environmentally-compatible packaging in the EU.With its distinguished editor and contributors, Environmentally-compatible food packaging is a valuable reference tool for professionals in the food processing and packaging industries. Reviews bio-based, biodegradable and recycled materials and their current and potential applications Discusses consumer preference, environmental performance, eco-design and the quality of recycled materials as factors involved in choosing alternative packaging materials Summarises EU legislation and certification of environmentally compatible packaging
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.
Download or read book Plasticization and Morphology Development in Dynamically Vulcanized Thermoplastic Elastomers written by Shant Shahbikian and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamically vulcanized thermoplastic elastomers constitute one of the main categories among various types of thermoplastic elastomers (TPEs). Due to the commercial importance of this particular group of TPEs, tremendous efforts have been dedicated to improve the understanding and control the phase morphology development. The ultimate goal is to obtain materials with improved physical and mechanical properties. As in other polymeric compounds, the parameters during the mixing stage have a significant influence on the final morphology of dynamically vulcanized blends. Furthermore, the phase morphology and, therefore, the distribution of elastomeric domains in the thermoplastic phase are also strongly dependent on the formulation. This chapter discusses the main important processing factors and, more specifically, highlights the effects of plasticization and curing on the morphology development of dynamically vulcanized thermoplastic elastomer blends. The following text provides fundamental information on how one should take into consideration each parameter affecting the morphology of nonreactive and reactive elastomer/thermoplastic blends.
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 MEMS Mechanical Sensors written by Stephen Beeby and published by Artech House. This book was released on 2004 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here's the book to keep handy when you have to overcome obstacles in design, simulation, fabrication and application of MEMS sensors. This practical guide to design tools and packaging helps you create the sensors you need for the full range of mechanical microsensor applications. Critical physical sensing techniques covered include piezoresistive, piezoelectric, capacative, optical, resonant, actuation, thermal, and magnetic, as well as smart sensing.
Download or read book Handbook of Thermoplastic Elastomers written by Jiri George Drobny and published by William Andrew. This book was released on 2007-08-11 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are few if any adequate guides to the properties, processing, and applications of thermoplastic elastomers, in spite the skyrocketing rise in the use of these materials. Until now. This new book sets the standard for a reference on these materials by compiling in one comprehensive volume an applicable knowledge of the chemistry, processing, and all properties, and uses of thermoplastic elastomers. Copiously illustrated and full of applicable processing and engineering data, this is the very definition of a ""definitive"" user's guide.
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:
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.
Download or read book Natural Rubber Materials written by Sabu Thomas and published by Royal Society of Chemistry. This book was released on 2013-11-27 with total page 635 pages. Available in PDF, EPUB and Kindle. Book excerpt: The combination of its unique morphology, physical properties, cost effectiveness and environmental friendliness make natural rubber an appealing constituent for many materials and applications. This comprehensive two volume set covers the synthesis, characterization and applications of natural rubber based blends, interpenetrating polymer networks, composites and nanocomposites. Volume 1 covers different types of natural rubber-based blends and IPNs as well as manufacturing methods, thermo mechanical characterization techniques, life cycle analysis and their applications. Volume 2 focuses on natural rubber-based composites and Nanocomposites including the different types of fillers, the filler-matrix reinforcement mechanisms, manufacturing techniques, and applications. This is the first book to consolidate the current state of the art information on natural rubber based materials with contributions from established international experts in the field. The book provides a "one stop" reference resource for professionals, researchers, industrial practitioners, graduate students, and senior undergraduates in the fields of polymer science and engineering, materials science, surface science, bioengineering and chemical engineering.
Download or read book Advances in Polymer Nanocomposites written by Fengge Gao and published by Elsevier. This book was released on 2012-10-19 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt: The addition of nanoparticles to polymer composites has led to a new generation of composite materials with enhanced and novel properties. Advances in polymer nanocomposites reviews the main types of polymer nanocomposites and their applications.Part one reviews types of polymer nanocomposites according to fillers. Processing of carbon nanotube-based nanocomposites, layered double hydroxides (LDHs) and cellulose nanoparticles as functional fillers and reinforcement are discussed, alongside calcium carbonate and metal-polymer nanocomposites. Part two focuses on types of polymer nanocomposites according to matrix polymer, with polyolefin-based, (PVC)-based, nylon-based, (PET)-based and thermoplastic polyurethane (TPU)-based polymer nanocomposites discussed. Soft, gel and biodegradable polymer nanocomposites are also considered. Part three goes on to investigate key applications, including fuel cells, aerospace applications, optical applications, coatings and flame-retardant polymer nanocomposites.With its distinguished editor and international team of expert contributors, Advances in polymer nanocomposites is an essential guide for professionals and academics involved in all aspects of the design, development and application of polymer nanocomposites. Reviews the main types of polymer nanocomposites and their applications Discusses processing of carbon nanotube-based nanocomposites, layered double hydroxides (LDHs) and cellulose nanoparticles as functional fillers and reinforcement Discusses polyolefin-based, (PVC)-based, nylon-based, (PET)-based and thermoplastic polyurethane (TPU)-based polymer nanocomposites
Download or read book Thermoplastic Elastomers written by Adel El-Sonbati and published by BoD – Books on Demand. This book was released on 2012-03-28 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermoplastics can be used for various applications, which range from household articles to the aeronautic sector. This book, "Thermoplastic Elastomers", is comprised of nineteen chapters, written by specialized scientists dealing with physical and/or chemical modifications of thermoplastics and thermoplastic starch. Such studies will provide a great benefit to specialists in food, electric, telecommunication devices, and plastic industries. Each chapter provides a comprehensive introduction to a specific topic, with a survey of developments to date.
Download or read book The Effect of Temperature and Other Factors on Plastics and Elastomers written by Laurence W. McKeen and published by Elsevier. This book was released on 2023-04 with total page 852 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Effect of Temperature and Other Factors on the Properties of Plastics and Elastomers, Fourth Edition provides data on the wide spectrum of plastics and TPEs with special reference to thermal stability. The mechanical, physical and electrical properties of plastics and elastomers are described as a function of temperature and humidity to help with the design of lighter more cost-effective plastic parts to replace metal ones. In this new edition, expertly edited data makes it easy for readers to learn about the properties of plastic materials without having to search the general literature or depend on suppliers. Additional types of plastics are examined, and the latest data on material characteristics are provided. Complex details such as how the thermal prehistory can effect final mechanical properties, and how temperature scans reveal dynamic mechanical behavior are also examined to build a deeper understanding of the materials.
