Download or read book Novel Advanced Thermoplastic Elastomers and Solution Properties of Polybenzofulvene written by Huiqun Wang (Researcher in polymer chemistry) and published by . This book was released on 2018 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermoplastic elastomers with thermally reversible physical crosslinks are ideal alternates to thermoset rubbers because of their recyclable and reprocessible nature. Styrenic block copolymers represent the most inexpensive block copolymers on the market. However, challenges remain in tailoring thermal and mechanical properties and enhancing upper service temperature. Living anionic polymerization (LAP) is the most powerful synthetic technique to generate well-defined polymers and block copolymers. In this dissertation, we present preparation of new functionalized macromonomers and block copolymers by LAP. Our aim is to develop TPEs with enhanced UST and tailorable properties by design of macromonomers with tunable conformation and functionalizable TPEs with ability in undergoing versatile post-polymerization modification. General aspects of styrenic TPEs, motivations, classic and state-of-the-art linear ABA triblock copolymer TPEs, followed the importance of macromonomers in preparing multigraft copolymer TPEs with exceptional elasticity are presented, in Chapter 1. High vacuum experimental techniques in LAP are also introduced. Incorporating PBF into multigraft copolymer side chains enables the thermal and mechanical properties of multigraft TPEs to be tuned by changing architecture and conformation. We describe the first synthesis of polybenzofulvene (PBF) macromonomer with styrenic end-functional groups through four different approaches by LAP and post-polymerization modification. The pros and cons of each method are discussed accordingly. In the next chapter, we discuss the correlation of microstructure, chain flexibility and glass transition temperature of PBF by studying the solution properties (specifically, characteristic ratio C∞̳). PBF with varied 1,2-/1,4 addition ratios were prepared by LAP. Their intrinsic viscosity and molecular weights were readily measured for monodisperse fractions by online SEC equipped with multiple detectors. The Burchard-Stockmayer-Fixman (BSF) model was used to derive C∞̳. The preparation and characterization of a highly functionalizable ABA block copolymer TPE with poly(4-vinyl pyridine) (P4VP) hard segments is discussed in Chapter 4. Morphological, mechanical properties and thermal properties were studied for diblock and triblock copolymers with different compositions and molecular weights. In the end, conclusions and prospects for future work are presented.
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 Novel Thermoplastic Elastomers Based on Benzofulvene written by Weiyu Wang and published by . This book was released on 2015 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermoplastic elastomers (TPEs) are of great importance both academically and technologically. Currently TPEs are the predominated form of styrene-diene copolymers. However, these styrenic TPEs have serious limitations in applications, especially at higher temperature, because of their low upper service temperature (UST). The work described in this dissertation aimed to developing thermoplastic elastomers with a higher UST and lower cost. In order to develop TPEs with a higher UST, we employed benzofulvene, an anionically polymerizable monomer in hydrocarbon solvent at room temperature, as the glassy block and copolymerized it with isoprene to prepare polybenzofulvene-polyisoprene-polybenzofulvene (FIF) triblock copolymers. Among all triblock copolymers studied, FIF with 14 vol% [volume percentage] of PBF [polybenzofulvene] exhibited a maximum stress of 14.3 MPa [megapascal] and strain at break of 1394 % from tensile tests. Dynamic mechanical analysis showed that the upper service temperature of FIF is 145°C. Microphase separation of FIF triblock copolymers was observed by small angle X-ray scattering, however, without long range order. Additionally, we report the effects of partial and complete hydrogenation on the thermal stability, mechanical and morphological properties of high temperature thermoplastic elastomers comprised of polybenzofulvene-polyisoprene-polybenzofulvene (FIF) triblock copolymers. After hydrogenation of polyisoprene and unsaturated carbon bonds in the five member ring of PBF, ultimate tensile stress was reduced to 11.2 MPa with strain at break of 750%. The upper service temperature also decreased to 125 °C. The fully hydrogenated triblock copolymer demonstrated an ultimate stress of 17.4 MPa at 744 % strain. The glass transition temperature (Tg̳) of fully hydrogenated PBF was 130 °C. Thermal stability was greatly improved by both partial and complete hydrogenation. Lastly, we developed a cost efficient method to prepare high molecular weight "comb-shaped" graft copolymers, poly(isoprene-g-styrene), with polyisoprene as the backbone and polystyrene as side chains. The grafted polymers were synthesized via free radical emulsion polymerization by copolymerization of isoprene with a polystyrene macromonomer synthesized using anionic polymerization. A material incorporating 29 wt% [weigh percentage] polystyrene exhibits a disordered microphase separated morphology and elastomeric properties. These materials show promise as new, highly tunable, and potentially low cost thermoplastic elastomers.
Download or read book Synthesis Characterization and Physical Properties of Novel Poly indene b isobutylene b indene Thermoplastic Elastomers written by Sanjeev Midha and published by . This book was released on 1992 with total page 240 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 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 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 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 148 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.
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 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.
Download or read book Elastomer Technology Handbook written by Nicholas P. Cheremisinoff and published by CRC Press. This book was released on 2020-07-09 with total page 1113 pages. Available in PDF, EPUB and Kindle. Book excerpt: Elastomer Technology Handbook is a major new reference on the science and technology of engineered elastomers. This contributed volume features some of the latest work by international experts in polymer science and rubber technology. Topics covered include theoretical and practical information on characterizing rubbers, designing engineering elastomers for consumer and engineering applications, properties testing, chemical and physical property characterization, polymerization chemistry, rubber processing and fabrication methods, and rheological characterization. The book also highlights both conventional and emerging market applications for synthetic rubber products and emphasizes the latest technology advancements. Elastomer Technology Handbook is a "must have" book for polymer researchers and engineers. It will also benefit anyone involved in the handling, manufacturing, processing, and designing of synthetic rubbers.
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 Advances in Thermoplastic Elastomers written by Nikhil K. Singha and published by Elsevier. This book was released on 2024-01-26 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Thermoplastic Elastomers: Challenges and Opportunities brings together the state-of-the-art in thermoplastic elastomers (TPEs), covering innovative materials, synthesis techniques, processing methods and sustainability. Sections outline thermoplastic elastomers, rubber elastic, and thermoplastic vulcanizates, and review the current landscape, from research and published literature, to commercialization and patents. Subsequent chapters offer methodical coverage of different categories of advanced thermoplastic elastomer materials, including areas such as polyolefin-based TPEs and high performance TPEs. The final chapters in the book examine options for sustainability, including bio-based, bio-resourced, and biodegradable TPEs, as well as circular economy and recycling of TPEs.Finally, outlook and future market and research trends are reviewed. This is a valuable book for researchers and advanced students working with elastomers, polymer science, materials chemistry, and materials engineering. In an industrial setting, this is an essential resource for R&D professionals, scientists, and engineers looking to utilize thermoplastic elastomers in a range of advanced applications. Focuses on novel materials, such as polyolefin-based TPEs, fluorinated TPEs, silicone-based TPEs, and ionic TPEs Discusses sustainability in terms of bio-based or biocompatible TPEs, recycling and the circular economy Helps bridge the gap between research and commercialization, reviewing patents, literature, trends, and market.
Download or read book Developments in Thermoplastic Elastomers written by K. E. Kear and published by iSmithers Rapra Publishing. This book was released on 2003 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermoplastic elastomers (TPEs) have the elastic behaviour of rubber and the processability of thermoplastics. The Freedonia Group has forecast that demand will expand by 6.4% per year to around 2.15 million tons in 2006. There is potential for these new, exciting materials to expand into the much larger thermoset rubber markets. This review includes comparisons between the two material types. There are three major types of TPE: block copolymers, rubber/plastic blends and dynamically vulcanised rubber/plastic alloys known as thermoplastic vulcanisates. The chemistry of these materials and how.
Download or read book Thermoplastic Elastomers written by P. W. Dufton and published by iSmithers Rapra Publishing. This book was released on 2001 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report contains discussion of the different families of thermoplastic elastomer materials, and of the trends in material developments. The key end-use sectors are analysed in terms of material usage and future trends.
Download or read book Thermoplastic Elastomers written by Hans R. Kricheldorf and published by Hanser Verlag. This book was released on 2004 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermoplastic elastomers are one of the fastest growing material groups. They can be processed like thermoplastics but their properties are close to those of vulcanized elastomers. New products, new processing techniques, new properties, and new applications have developed since the publication of the second edition. All these developments are reflected in the new edition of this well-established standard work. A unique and comprehensive, up-to-date guide to all scientific and technical aspects of thermoplastic elastomers - indispensable for everyone working in this field.
Download or read book Thermoplastic Elastomers written by N. R. Legge and published by Oxford University Press, USA. This book was released on 1987 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt: This excellent textbook brings together critical state-of-the-art reviews on all aspects of thermoplastic elastomer research and development, from Bayer's early work on polyurethanes to the extended variety of types now being offered commercially. Each group of elastomers is covered in depth by an expert thoroughly familiar with these materials. The chapters provide a very complete technical description of the polymers, including their chemical structures, molecular weights, and morphology. They also cover processing, physical properties, and applications. A section on future trends completes the volume.
