Photodegradation Of Polymers

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Polymer Photodegradation

Author : J.F. Rabek
Publisher : Springer Science & Business Media
Page : 679 pages
File Size : 54,7 Mb
Release : 2012-12-06
Category : Technology & Engineering
ISBN : 9789401112741

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Polymer Photodegradation by J.F. Rabek Pdf

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 of Polymers

Author : Jan F. Rabek
Publisher : Springer Science & Business Media
Page : 222 pages
File Size : 41,6 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642800900

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Photodegradation of Polymers by Jan F. Rabek Pdf

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.

Photostabilization of Polymers

Author : J.F. Rabek
Publisher : Springer Science & Business Media
Page : 607 pages
File Size : 45,5 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789400907478

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Photostabilization of Polymers by J.F. Rabek Pdf

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.

Photodegradation and Light Stabilization of Heterochain Polymers

Author : Niyazi,Savenkova
Publisher : CRC Press
Page : 195 pages
File Size : 46,5 Mb
Release : 2006-11-14
Category : Technology & Engineering
ISBN : 9789004153622

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Photodegradation and Light Stabilization of Heterochain Polymers by Niyazi,Savenkova Pdf

Photodegradation and light stabilization are very important aspects of polymer aging. Polymer degradation includes different types of processes: thermodegradation, oxidation, acting of ozone, photodegradation, radiation, hydrolysis, mechanical degradation, and biodegradation. It is very important to know the mechanism of polymer degradation in order to select stabilizers against the degradation. This volume presents the analysis of achievements in the field of photodegradation of polymers. It includes, first of all, data of Russian investigators who have decisively contributed in the development of this field of knowledge (the schools headed by academicians V.V. Korshak, N.M. Emanuel, N.S. Enikolopov, A.A. Berlin, and many others).

Degradation of Polymers

Author : R.G. Compton,C.H. Bamford,C.F.H. Tipper†
Publisher : Elsevier
Page : 561 pages
File Size : 41,8 Mb
Release : 1975-01-01
Category : Science
ISBN : 0080868088

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Degradation of Polymers by R.G. Compton,C.H. Bamford,C.F.H. Tipper† Pdf

Degradation of Polymers

Polymer Degradation and Stabilisation

Author : Norman Grassie,Gerald Scott
Publisher : CUP Archive
Page : 236 pages
File Size : 52,6 Mb
Release : 1988-04-14
Category : Science
ISBN : 0521357977

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Polymer Degradation and Stabilisation by Norman Grassie,Gerald Scott Pdf

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.

Photodegradation of Polymers

Author : Jan F Rabek
Publisher : Unknown
Page : 230 pages
File Size : 50,8 Mb
Release : 1996-07-04
Category : Electronic
ISBN : 3642800912

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Photodegradation of Polymers by Jan F Rabek Pdf

Polymer Photodegradation

Author : Jan F. RABEK
Publisher : Springer
Page : 664 pages
File Size : 45,5 Mb
Release : 2012-09-19
Category : Technology & Engineering
ISBN : 9401045569

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Polymer Photodegradation by Jan F. RABEK Pdf

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.

Fundamentals of Polymer Degradation and Stabilization

Author : N.S. Allen,M. Edge
Publisher : Springer Science & Business Media
Page : 218 pages
File Size : 48,5 Mb
Release : 1992-10-31
Category : Technology & Engineering
ISBN : 1851667733

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Fundamentals of Polymer Degradation and Stabilization by N.S. Allen,M. Edge Pdf

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.

Degradation and Stabilisation of PVC

Author : J. Owen
Publisher : Springer Science & Business Media
Page : 325 pages
File Size : 42,7 Mb
Release : 2012-12-06
Category : Technology & Engineering
ISBN : 9789400956186

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Degradation and Stabilisation of PVC by J. Owen Pdf

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.

Photodegradation and Light Stabilization of Heterochain Polymers

Author : I. V. Savenkova,G. E. Zaikov
Publisher : Unknown
Page : 128 pages
File Size : 46,7 Mb
Release : 2007
Category : Electronic
ISBN : OCLC:746574460

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Photodegradation and Light Stabilization of Heterochain Polymers by I. V. Savenkova,G. E. Zaikov Pdf

Photodegradation and light stabilization are very important aspects of polymer aging. Polymer degradation includes different types of processes: thermodegradation, oxidation, acting of ozone, photodegradation, radiation, hydrolysis, mechanical degradation and biodegradation. It is very important to know the mechanism of polymer degradation in order to select stabilizers against the degradation. This volume presents the analysis of recent achievements in the field of photodegradation of polymers. It includes, first of all, data of Russian investigators who have decisively contributed in the development of this field of knowledge (the schools headed by academicians V.V. Korshak, N.M. Emanuel, N.S. Enikolopov, A.A. Berlin and many others).

Polymer Analysis Polymer Physics

Author : Anonim
Publisher : Springer
Page : 0 pages
File Size : 42,7 Mb
Release : 1996-11-04
Category : Technology & Engineering
ISBN : 3540612181

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Polymer Analysis Polymer Physics by Anonim Pdf

Enzymatic Plastic Degradation

Author : Anonim
Publisher : Academic Press
Page : 500 pages
File Size : 41,7 Mb
Release : 2021-02-10
Category : Science
ISBN : 9780128220139

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Enzymatic Plastic Degradation by Anonim Pdf

Enzymatic Plastic Degradation, Volume 648 in the Methods in Enzymology series, continues the legacy of this premier serial with chapters authored by leaders in the field. Chapters in this latest release include Evaluating plastic pollution and environmental degradation, Assessment methods for microplastic pollution in the oceans and fresh water, Exploring microbial consortia from various environments for plastic degradation, Characterization of filamentous fungi for attack on synthetic polymers via biological Fenton chemistry, Synthesis of radioactive-labeled nanoplastics for assaying the environmental (microbial) PS degradation, Exploring metagenome for plastic degrading enzymes, Cutinases from thermophilic bacteria (actinomycetes): from identification to functional and structural characterization, and much more. Provides the authority and expertise of leading contributors from an international board of authors Presents the latest release in the Methods in Enzymology series Covers the latest research and technologies in enzymatic plastic degradation

Photodegradation of Water Pollutants

Author : Martin M. Halmann
Publisher : CRC Press
Page : 322 pages
File Size : 43,7 Mb
Release : 1995-12-05
Category : Technology & Engineering
ISBN : 0849324599

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Photodegradation of Water Pollutants by Martin M. Halmann Pdf

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.