Photodegradation Of Polymers

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Photodegradation Of Polymers

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Author : Jan F. Rabek
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

Photodegradation Of Polymers written by Jan 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.

In this book on physical characteristics and practical aspects of polymer photodegradation Rabek emphasizes the experimental work on the subject. The most important feature of the book is the physical interpretation of polymer degradation, e.g. mechanism of UV/light absorption, formation of excited states, energy transfer mechanism, kinetics, dependence on physical properties of macromolecules and polymer matrices, formation of mechanical defects, practics during environmental ageing. He includes also some aspects of polymer photodegradation in environmental and space condition.

Polymer Photodegradation

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

Polymer Photodegradation 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 Technology & Engineering 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. The photochemical instability of most polymers limits their outdoor application as they are photodegraded quickly over periods from months to a few years. To the despair of technologists and consumers alike, photodegradation and environmental ageing of polymers occur much faster than can be expected from knowledge collected in laboratories. In order to improve polymer photostability there has been a very big effort during the last 30 years to understand the mechanisms involved in photodegradation and environmental ageing. This book represents the author's attempt, based on his 25 years' experience in research on photodegradation and photo stabilization, to collect and generalize a number of available data on the photodegradation of polymers. The space limitation and the tremendous number of publications in the past two decades have made a detailed presentation of all important results and data difficult. The author apologizes to those whose work has not been quoted or widely presented in this book. Because many published results are very often contradictory, it has been difficult to present a fully critical review of collected knowledge, without antagonizing authors. For that reason, all available theories, mechanisms and different suggestions have been presented together, and only practice can evaluate which of them are valid.

Photodegradation Photo Oxidation And Photostabilization Of Polymers

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Author : Bengt Ranby
language : en
Publisher:
Release Date : 1986

Photodegradation Photo Oxidation And Photostabilization Of Polymers written by Bengt Ranby and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.

Degradation Of Polymers

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Author : R.G. Compton
language : en
Publisher: Elsevier
Release Date : 1975-01-01

Degradation Of Polymers written by R.G. Compton and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975-01-01 with Science categories.

Degradation of Polymers

Polymer Degradation And Stabilisation

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Author : Norman Grassie
language : en
Publisher: CUP Archive
Release Date : 1988-04-14

Polymer Degradation And Stabilisation written by Norman Grassie and has been published by CUP Archive this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988-04-14 with Science categories.

The study of polymer degradation and stabilisation is of considerable practical importance as the industrial uses of polymeric materials continue to expand. In this book, the authors lucidly relate technological phenomena to the chemistry and physics of degradation and stabilisation processes. Degradation embraces a variety of technologically important phenomena ranging from relatively low temperature processes such as 'weathering' of plastics, 'fatigue' of rubbers through the processing of polymers in shearing mixers to very high temperature processes such as flammability and ablation. All these technological phenomena have in common certain basic chemical reactions. Thus 'weathering' has its roots in photo-oxidation, 'fatigue' and melt-degradation in mechano-oxidation and flammability, and ablation in ablation in pyrolysis and vapour phase oxidation.

Degradation And Stabilisation Of Pvc

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Author : J. Owen
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

Degradation And Stabilisation Of Pvc written by J. Owen 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.

Polyvinyl chloride has played a key role in the development of the plastics industry over the past 40 years and continues to be a polymer of major importance. The reasons for its enormous versatility and range of application derive from a combination of the basic structure which gives rise to a relatively tough and rigid material and its ability to accept a range of plasticisers and other additives which can modify its physical characteristics to produce a range of flexible products. Two major problems, however, have tested the skill and ingenuity of PVC technologists since earliest times. One is the thermal instability of the material at the temperatures required for melt processing and fabrication, and the second is the photochemical instability which until recently has limited the potentially large range of outdoor applications. Both problems have been handled in a commercially satisfactory way by the gradual development of a range of stabilisers, lubricants and other processing aids and the high quality material which has resulted has led to massive utilisation of PVC by industry. Totally adequate stabilisation requires a detailed understanding of the mechanisms by which degradation processes are initiated and propagated. Although great advances have been made in this respect in recent years the problem remains incompletely understood. This book presents an account of the present position and the problems which remain to be solved.

Thermal Degradation Of Polymeric Materials

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Author : Krzysztof Pielichowski
language : en
Publisher: iSmithers Rapra Publishing
Release Date : 2005

Thermal Degradation Of Polymeric Materials written by Krzysztof Pielichowski 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.

Understanding the thermal degradation of polymers is of paramount importance for developing a rational technology of polymer processing and higher-temperature applications. Controlling degradation requires understanding of many different phenomena, including chemical mechanisms, the influence of polymer morphology, the complexities of oxidation chemistry, and the effects of stabilisers, fillers and other additives. This book offers a wealth of information for polymer researchers and processors requiring an understanding of the implications of thermal degradation on material and product performance.

Photodegradation Of Water Pollutants

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Author : Martin M. Halmann
language : en
Publisher: CRC Press
Release Date : 1995-12-05

Photodegradation Of Water Pollutants written by Martin M. Halmann and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995-12-05 with Technology & Engineering categories.

Photodegradation of Water Pollutants, the only complete survey available of current photocatalytic methods for treating water pollutants, covers all aspects of light-stimulated detoxification. Ideal for researchers and students, this new book explains methods for pollution treatment that have proven more effective than conventional biodegradation. Photodegradation of Water Pollutants examines advanced oxidation processes that have been successful in treating the chemical substances produced by industrial effluents and intensive agriculture. These oxidation processes include irradiation with ultraviolet or visible light, the use of homogenous sensitizers, such as dyes, and the use of heterogeneous photocatalysts, such as dispersed semiconductors. In addition, Photodegradation of Water Pollutants addresses the naturally occurring self-cleaning of some pollutants in sunlit surface waters, as well as several alternative non-photochemical approaches to water treatment. Available treatment options are discussed for the main groups of water pollutants, including toxic inorganic ions (cyanides, heavy metals), hydrocarbon derivatives (oil spills, surfactants, pulp and paper wastes), halocarbons, organo-N, organo-P, and organo-S compounds. The text also contains a unique section on the economics of advanced oxidation pollution treatments.

Modern Styrenic Polymers

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Author : John Scheirs
language : en
Publisher: John Wiley & Sons
Release Date : 2003-03-28

Modern Styrenic Polymers written by John Scheirs 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 2003-03-28 with Technology & Engineering categories.

Der Band stellt die neuesten Entwicklungen auf dem Gebiet der Polystyrole vor. - Polystyrole gehören zu den ältesten kommerziell verwerteten Thermoplast-Werkstoffen - innerhalb der letzten fünf Jahre waren wichtige Fortschritte sowohl bei den Polymerisationsverfahren als auch beim Design neuartiger Polymerstrukturen zu verzeichnen - in diesem Band wurde Material zusammengestellt, das bisher nur bei Tagungen präsentiert wurde und deshalb in der Literatur schwer aufzufinden ist - zu den Themen gehören verzweigte Polystyrole, syndiotaktisches Polystyrol, PS mit hoher Molmasse und SBS-Copolymere