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1000 tulosta hakusanalla "Polymers"

Filled Polymers

Filled Polymers

Jean L. Leblanc

CRC Press Inc
2009
sidottu
The idea of mixing single available materials into compounds to fulfill a set of desired properties is likely as old as mankind. Highly sophisticated polymer applications would simply be impossible without the enhancement of some of their properties through addition of fine mineral particles or synthetic or natural short fibers. Many filled polymers, either thermoplastics or vulcanizable rubbers, have different chemical natures but exhibit common singular properties. An understanding of why they do so is likely to be the source of promising scientific and engineering developments—and Filled Polymers: Science and Industrial Applications thoroughly explores the question. Based on the author’s 30 years of research, engineering activities, and teaching in the field of complex polymer systems, this comprehensive survey of polymer applications illustrates their commonalities and the scientific background behind their many industrial uses. The text analyzes theoretical considerations which explain the origin of the singular properties of filled polymers, and it includes appendices which feature a selection of calculation worksheets that offer numerical illustrations of several of the theoretical considerations discussed in the book.Our understanding of polymer reinforcement remains incomplete because any progress in the field is strongly connected with either the availability of appropriate experimental and observation techniques or theoretical views about polymer-filler interactions, or both. This book presents tools—such as equations tested with familiar calculation software—to clarify these concepts and take understanding to the highest possible level.
Biorelated Polymers

Biorelated Polymers

Springer-Verlag New York Inc.
2010
nidottu
Application of polymers from renewable resources - also identified as biopolymers - has a large potential market due to the current emphasis on sustainable technology. For optimal R&D achievements and hence benefits from these market opportunities, it is essential to combine the expertise available in the vast range ofdifferent disciplines in biopolymer science and technology. The International Centre of Biopolymer Technology - ICBT - has been created with support from the European Commission to facilitate co­ operation and the exchange of scientific knowledge between industries, universities and other research groups. One of the activities to reach these objectives, is the organisation ofa conference on Biopolymer Technology. In September 1999, the first international conference on Biopolymer Technology was held in Coimbra, Portugal. Because of its success - both scientifically and socially - and because ofthe many contacts that resulted in exchange missions or other ICBT activities, it was concluded that a second conference on Biopolymer Technology was justified. This second conference was held in Ischia, Italy in October 2000. And again, the scientific programme contained a broad spectrum ofpresentations in a range of fields such as biopolymer synthesis, modification, technology, applications, material testing and analytical methods.
Reactive Polymers Fundamentals and Applications

Reactive Polymers Fundamentals and Applications

Johannes Karl Fink

William Andrew Publishing
2013
sidottu
The use of reactive polymers enables manufacturers to make chemical changes at a late stage in the production process—these in turn cause changes in performance and properties. Material selection and control of the reaction are essential to acheive optimal performance. The second edition of Reactive Polymers Fundamentals and Applications introduces engineers and scientists to the range of reactive polymers available, explains the reactions that take place, and details applications and performance benefits. Basic principles and industrial processes are described for each class of reactive resin (thermoset), as well as additives, the curing process, and applications and uses. The initial chapters are devoted to individual resin types (e.g. epoxides, cyanacrylates, etc.); followed by more general chapters on topics such as reactive extrusion and dental applications. Material new to this edition includes the most recent developments, applications and commercial products for each chemical class of thermosets, as well as sections on fabrication methods, reactive biopolymers, recycling of reactive polymers, and case studies. Injection molding of reactive polymers, radiation curing, thermosetting elastomers, and reactive extrusion equipment are all covered as well.
Amorphous Polymers and Non-Newtonian Fluids

Amorphous Polymers and Non-Newtonian Fluids

Springer-Verlag New York Inc.
2012
nidottu
This IMA Volume in Mathematics and its Applications AMORPHOUS POLYMERS AND NON-NEWTONIAN FLUIDS is in part the proceedings of a workshop which was an integral part of the 1984-85 IMA program on CONTINUUM PHYSICS AND PARTIAL DIFFERENTIAL EQUATIONS We are grateful to the Scientific Committee: Haim Brezis Constantine Dafermos Jerry Ericksen David Kinderlehrer for planning and implementing an exciting and stimulating year-long program. We espe­ cially thank the Program Organizers, Jerry Ericksen, David Kinderlehrer, Stephen Prager and Matthew Tirrell for organizing a workshop which brought together scientists and mathematicians in a variety of areas for a fruitful exchange of ideas. George R. Sell Hans Weinberger Preface Experiences with amorphous polymers have supplied much of the motivation for developing novel kinds of molecular theory, to try to deal with the more significant features of systems involving very large molecules with many degrees offreedom. Similarly, the observations of many unusual macroscopic phenomena has stimulated efforts to develop linear and nonlinear theories of viscoelasticity to describe them. In either event, we are confronted not with a well-established, specific set of equations, but with a variety of equations, conforming to a loose pattern and suggested by general kinds of reasoning. One challenge is to devise techniques for finding equations capable of delivering definite and reliable predictions. Related to this is the issue of discovering ways to better grasp the nature of solutions ofthose equations showing some promise.
Biomimetic Polymers

Biomimetic Polymers

Springer-Verlag New York Inc.
2011
nidottu
The term biomimetic is comparatively new on the chemical scene, but the concept has been utilized by chemists for many years. Furthermore, the basic idea of making a synthetic material that can imitate the func­ tions of natural materials probably could be traced back into antiquity. From the dawn of creation, people have probably attempted to duplicate or modify the activities of the natural world. (One can even find allusions to these attempts in the Bible; e. g. , Genesis 30. ) The term "mimetic" means to imitate or mimic. The word "mimic" means to copy closely, or to imitate accurately. Biomimetic, which has not yet entered most dictionaries, means to imitate or mimic some specific bio­ logical function. Usually, the objective of biomimetics is to form some useful material without the need of utilizing living systems. In a simi­ lar manner, the term biomimetic polymers means creating synthetic poly­ mers which imitate the activity of natural bioactive polymers. This is a major advance in polymer chemistry because the natural bioactive polymers are the basis of life itself. Thus, biomimetic polymers imitate the life process in many ways. This present volume delineates some of the recent progress being made in this vast field of biomimetic polymers. Chemists have been making biomimetic polymers for more than fifty years, although this term wasn't used in the early investigations.
Functional Polymers

Functional Polymers

Springer-Verlag New York Inc.
2011
nidottu
This monograph contains manuscripts, poster abstracts and summary statements representing the contributions of a group of scientists who participated in the sixth annual Texas A&M Industry-University Cooperative Chemistry Program (IUCCP) at Texas A&M University in College Station, Texas, March 22-24, 1988. This symposium on "Functional Polymers" was organized by a university-industrial steering committee consisting of Dr. D. Keene, Hoechst Celanese; Dr. D. E. McLemore, Dow Chemical Company; Dr. B. Frushour, Monsanto Company; Dr. S. Corley, Shell Development; Dr. F. Hoffstadt, BPAmerica; Dr. D. E. Bergbreiter, Texas A&M University; Dr. C. A. J. Hoeve, Texas A&M University; Dr. C. R. Martin, Texas A&M University; Dr. A. Clearfield, Texas A&M University; and Dr. A. E. Martell, Texas A&M University. The symposium itself was generously supported by the industrial companies participating in the IUCCP program. These sponsoring chemical companies include; Shell Development Company, Dow Chemical Company, BPAmerica, Monsato Company and Hoechst Celanese. The choice of "Functional Polymers" as the subject for this symposium reflects the rapid developments occurring in the broad field of polymer science and the potential for using polymeric derivatives in many new exciting and potentially profitable applications. The invited papers and submitted posters reflect the diversity of this field and include many different topics ranging from biomedical applications of polymers to conducting polymers to use of polymers as lithographic masks and recording media. General topics included in the symposium were: photoresponsive polymers, polymer blends, electronically conductive polymers, polymers catalysts, biomedical polymers and membrane transport and permeability.
Conductive Polymers

Conductive Polymers

Springer-Verlag New York Inc.
2011
nidottu
Those who recognize that our modern life style is dependent, to a large extent, on the use of organic polymers as thermal and elec­ trical insulators, may be surprised to learn that specific plastics may also be used as conductors of electricity. In addition to demon­ strating the versatility of polymers, this use as conductors will lead to developments which were not possible with other available materials of construction. This is a new field which is growing rapidly because of intensive research and developmental efforts by many different industrial, governmental and university investigators. Many of these researchers reported advances in this art at a symposium on conductive polymers sponsored by the American Chemical Society's Division of Organic Coatings and Plastics Chemistry held at the Second Chemical Congress of the North American Continent at Las Vegas, in August 1980. The proceedings of this timely symposium are presented in this book. The editor wishes to take this opportunity to express his grati­ tude to the authors who contributed to this book and to the ACS Organic Coatings and Plastics Division for sponsoring this effort. Raymond B. Seymour Department of Polymer Science University of Southern Mississippi Hattiesburg, MS 39401 v CONTENTS 1 New Horizons in Conductive Polymers Raymond B. Seymour Synthesis and Characterization of Conductive 7 Palladium Containing Polyimide Films • T.L. Wohlford. J. Schaff. L.T. Taylor.
Biodegradable Polymers and Plastics

Biodegradable Polymers and Plastics

Springer-Verlag New York Inc.
2012
nidottu
Synthetic and semi-synthetic polymeric materials were originally developed for their durability and resistance to all forms of degradation including biodegradation. Such materials are currently widely accepted because of their ease of processability and amenability to provide a large variety of cost effective items that help to enhance the comfort and quality of life in the modern industrial society. However, this widespread utilization of plastics has contributed to a serious plastic waste burden, and the expectation for the 21st century is for an increased demand for polymeric material. This volume focuses on a more rational utilization of resources in the fabrication, consumption and disposal of plastic items, specifically: -Environmentally Degradable Polymeric Materials (EDPs); -Water-soluble/Swellable Biodegradable Polymers; -EDPs from Renewable Resources; -Biopolymers; -Bioresorbable Materials for Biomedical Applications; -Biorelated Polymers; -Standards and Regulations on EDPs.
Block Polymers

Block Polymers

Springer-Verlag New York Inc.
2012
nidottu
Block polymers represent another milestone in the preparation of polymers of controlled structure. Catalysts and polymerization methods that allowed the preparation of polymers in which the stereo- and geometric isomerism of the monomer units could be con­ trolled have indeed been among the major developments in polymer science during the last decade. The synthesis of block polymers, in which the sequence length of the comonomer units can be con­ trolled, portends equally important developments in the science and technology of polymers. The papers collected in this volume cover primarily the pro­ ceedings of the most recent symposium on block polymers, sponsored by the Division of Polymer Chemistry of the American Chemical Society. It was held in New York City during the Society's 158th National Meeting in September, 1969. Additional contributions from selected authors were invited especially for this book to achieve the most up-to-date account of the advances that have been made since the development of the thermoplastic elastomers that first brought into focus this important area of research. The first two papers in this volume draw attention to the various problems that should be considered in the preparation of block polymers of precisely defined structure from styrene and butadiene or isoprene by anionic polymerization. Characterization of block polymers presents many problems and there is a paucity of systematic work in this area. Attention has been given to the di­ lute solution properties of block polymers,however, in one of the papers in this volume.
Biomedical Polymers and Polymer Therapeutics
Proceedings of the Third International Symposium on Frontiers in Biomedical Polymers including Polymer Therapeutics: From Laboratory to Clinical Practice, held May 23-27, 1999, in Shiga, Japan. This book focuses on the progress and unique discoveries in the interdisciplinary scientific and technological area of biomedical application of polymers. The topics include polymeric materials for biomedical and pharmaceutical applications, as well as polymeric materials in therapeutics.
Conductive Polymers

Conductive Polymers

Apple Academic Press Inc.
2017
sidottu
This book is dedicated to the field of conductive polymers, focusing on electrical interactions with biological systems. It addresses the use of conductive polymers as the conducting interface for electrical communications with the biological system, both in vitro and in vivo. It provides an overview on the chemistry and physics of conductive polymers, their useful characteristics as well as limitations, and technologies that apply conductive polymers for medical purposes. This groundbreaking resource addresses cytotoxicity and tissue compatibility of conductive polymers, the basics on electromagnetic fields, and commonly used experimental methods. Readers will also learn how cells are cultured in vitro with conductive polymers, and how conductive polymers and living tissues interact electrically. Throughout the contents, chapter authors emphasize the importance of conductive polymers in biomedical engineering and their potential applications in medicine.
Superabsorbent Polymers

Superabsorbent Polymers

De Gruyter
2021
isokokoinen pokkari
The book defines the differences between synthetic and natural superabsorbent polymers. It describes polymerization techniques, processing strategies and the use and importance of smart SAPs. It also includes SAP design to aid in selection of the best SAP for a specific application. The book is an indispensible resource for any academics and industrials interested in SAPs.
Smart Polymers

Smart Polymers

José Miguel García; Félix Clemente García; José Antonio Reglero Ruiz; Saúl Vallejos; Miriam Trigo-López

De Gruyter
2022
isokokoinen pokkari
Smart polymers react sharply to small changes in physical or chemical conditions and present an intelligent response to chemical stimuli (i.e., chemical species -including biomolecules-, pH, solvents, redox, stimuli that trigger controlled depolymerization) and physical stimuli (i.e., temperature, light, mechanical stress and electrical stimuli). For these reasons, the interest in smart polymers has recently increased exponentially, especially in biological stimuli (i.e., application of polymer-based biosensors, drug delivery, tissue engineering, precision medicine and cell therapy). This book offers a unique opportunity to review the physical-chemical fundamentals of smart polymers, and their behaviour. It also provides an excellent review of the main applications of smart polymers.
Conjugated Polymers at Nanoscale

Conjugated Polymers at Nanoscale

Karen K. Gleason; Meysam Heydari Gharahcheshmeh

De Gruyter
2021
isokokoinen pokkari
Nanoscale control of order and orientation is essential for optimizing the performance of conjugated polymers. These semi-crystalline materials enable flexible devices for electronic, optical, electrochemical, and thermoelectric applications and are also of interest for the emerging fields of bioelectronics and spintronics.
Inorganic Polymers

Inorganic Polymers

Roger Jaeger; Mario Gleria

Nova Science Publishers Inc
2007
sidottu
Inorganic polymers are large molecules, usually linear or branched chains with atoms other than carbon in their backbone. In this new advanced research book, silicon-based inorganic polymers are treated by J Cypryk (Poland), G. Kickelbick (Austria), X. Coqueret (France), A. Colas (Belgium), J. Koe (Japan), W. Uhlig (Switzerland), and by M. Rehahn and M. Weinmann (Germany). Different aspects of phosphorus-containing macromolecules are described by F.F. Stewart (USA), R. De Jaeger and L. Montagne (France), and by M. Carenza, S. Lora, and M.Gleria (Italy). Tin- and germanium-based polymers are illustrated by M. Okano (Japan), while inorganic dendrimers are presented by A.M. Caminade and J.P. Majoral (France) and by V. Balzani (Italy). Miscellaneous topics covering the flame-retardant and the intumescent behaviour of the inorganic macromolecules (S. Bourbigot, France), ironically-conductive inorganic macromolecules (E. Montoneri, Italy) and chiral inorganic polymers (G.A. Carriedo and J.F. Garcia-Alonso, Spain) are also addressed.