Antioxidative Stabilization Of Polymers

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Antioxidative Stabilization Of Polymers


Antioxidative Stabilization Of Polymers
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Antioxidative Stabilization Of Polymers


Antioxidative Stabilization Of Polymers
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Author : Y A Shlyapnikov
language : en
Publisher: CRC Press
Release Date : 1996-10-09

Antioxidative Stabilization Of Polymers written by Y A Shlyapnikov and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996-10-09 with Science categories.


Polymers play a vital role in manufacturing processes of many kinds, and the development of new polymeric materials is of increasing importance in the field of materials science. Because of this, there is a need to understand why the properties of polymers change, what can be done to avoid degradation and failure, and how performance can be maintained over a much longer lifespan. The authors deal firstly with the process of degradation through oxidation, and then explain how the addition of various antioxidants can inhibit or retard this process. They present a unique discussion of the physico-chemical aspects, particularly the chemical kinetics of antioxidant action and of branched chain reaction kinetics, and the theory of critical phenomena inhibited oxidation. The last part of the book offers practical advice on methods of oxidation investigation, on selection of appropriate antixodants, and on the basic principles of performance prognosis. The book also includes a unique coverage of the regularities of additive solubility.

Aging And Stabilization Of Polymers


Aging And Stabilization Of Polymers
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Author : M. B. Neiman
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

Aging And Stabilization Of Polymers written by M. B. Neiman 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 2012-12-06 with Technology & Engineering categories.


The need for a broad development of the production of polymer ma terials has become evident. All these materials are subject to various types of aging (destruction); hence, stabilizers which permit the stor age, reprocessing, and use of polymer materials without any appreci able change in their properties must be introduced into them. In recent years, this problem of stabilizing polymers has attracted the attention of many scientists and technologists, both in the USSR and abroad. The scientific basis of the foreign studies will be found in a number of theo retical premises, but chiefly the theory of chain reactions with un branched chains. In the Soviet Union, the concepts of Academician N. N. Semenov on chain reactions with degenerate branches have become the starting point of theoretical studies of the stabilization and destruction of polymers. Soviet scientists have developed a theory of critical concentrations of antioxidants and have shown that the processes of stabilization have a very complex chemical character. The nature of the polymers them selves greatly affects these processes and consequently, different stabil izers are required for polymers of different structures. In addition, it has been shown that the antioxidants used thus far can not only cause chain termination, but can also initiate oxidation and give rise to de generate branches.

Mechanisms Of Polymer Degradation And Stabilisation


Mechanisms Of Polymer Degradation And Stabilisation
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Author : G. Scott
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

Mechanisms Of Polymer Degradation And Stabilisation written by G. Scott 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 2012-12-06 with Technology & Engineering categories.


The purpose of this publication is two-fold. In the first place it is intended to review progress in the development of practical stabilising systems for a wide range of polymers and applications. A complemen tary and ultimately more important objective is to accommodate these practical developments within the framework of antioxidant theory, since there can be little question that further major advances in the practice of stabilisation technology will only be possible on a firm mechanistic foundation. With the continual increase in the number of commercial anti oxidants and stabilisers, often functioning by mechanisms not even considered ten years ago, there is a need for a general theory which will allow the potential user to predict the performance of a particular antioxidant structure under specific practical conditions. Any such predictive tool must involve a simplified kinetic approach to inhibited oxidation and, in Chapter 1, Denisov outlines a possible mechanistic approach with the potential to predict the most useful antioxidant to use and the limits of its usefulness. In Chapter 2, Schwetlick reviews the current state of knowledge on the antioxidant mechanisms of the phosphite esters with particular emphasis on their catalytic peroxidolytic activity. Dithiophosphate v vi PREFACE derivatives show a similar behaviour but for quite different reasons and, in Chapter 3, AI-Malaika reviews information available from analytical studies, particularly using 31p_NMR spectroscopy, to elucid ate the complex chemistry that leads to the formation of the antioxidant -active agents.

Stabilization Of Polymers And Stabilizer Processes


Stabilization Of Polymers And Stabilizer Processes
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Author : Norbert A. J. Platzer
language : en
Publisher:
Release Date : 1968

Stabilization Of Polymers And Stabilizer Processes written by Norbert A. J. Platzer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Electronic books categories.




Photostabilization Of Polymers


Photostabilization Of Polymers
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Author : J.F. Rabek
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

Photostabilization Of Polymers written by J.F. Rabek 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 2012-12-06 with Science categories.


During the last two decades, the production of polymers and plastics has been increasing rapidly. In spite of developing new polymers and polymeric materials, only 40-60 are used commercially on a large scale. It has been estimated that half of the annual production of polymers is employed outdoors. Increasing the stability of polymers and plastics towards heat, light, atmospheric oxygen and other environmental agents and weathering conditions has always been a very important problem. The photochemical instability of most of polymers limits them to outdoor application, where they are photo degraded fast over periods ranging from months to a few years. To the despair of technologists and consumers alike, photodegrada tion and environmental ageing of polymers occur much faster than can be expected from knowledge collected in laboratories. In many cases, improved methods of preparation and purification of both monomers and polymers yield products of better quality and higher resistance to heat and light. However, without stabilization of polymers by applica tion of antioxidants (to decrease thermal oxidative degradation) and photostabilizers (to decrease photo-oxidative degradation) it would be impossible to employ polymers and plastics in everyday use.

Antioxidative Stabilization Of Polymers


Antioxidative Stabilization Of Polymers
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Author : S. G. Kiryushkin Y. A. Shlyapnikov (A. P. Mar'in)
language : en
Publisher:
Release Date : 1996

Antioxidative Stabilization Of Polymers written by S. G. Kiryushkin Y. A. Shlyapnikov (A. P. Mar'in) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with categories.




Fundamentals Of Polymer Degradation And Stabilization


Fundamentals Of Polymer Degradation And Stabilization
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Author : N.S. Allen
language : en
Publisher: Springer Science & Business Media
Release Date : 1992-10-31

Fundamentals Of Polymer Degradation And Stabilization written by N.S. Allen 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 1992-10-31 with Technology & Engineering categories.


During the past decade, the field of polymer degradation and stabilization has become a subject of central importance in polymer science and technology. This book provides a fundamental source of information designed for those with only a basic understanding of the background of the field.