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Author : Bengt G. Rånby,J. F. Rabek
Publisher : John Wiley & Sons
Page : 600 pages
File Size : 41,5 Mb
Release : 1975
Category : Science
ISBN : STANFORD:36105031700607
Author : Bengt Ranby,J. F. Rabek
Publisher : Unknown
Page : 573 pages
File Size : 44,5 Mb
Release : 1986
Category : Electronic
ISBN : OCLC:605366668
Author : Bengt Ranby,J. F. Rabek
Publisher : Unknown
Page : 585 pages
File Size : 46,9 Mb
Release : 1986
Category : Electronic
ISBN : 0608101524
Author : Bengt G. Ränby
Publisher : Unknown
Page : 588 pages
File Size : 49,5 Mb
Release : 1989
Category : Electronic
ISBN : OCLC:440938059
Author : J.F. Rabek
Publisher : Springer Science & Business Media
Page : 607 pages
File Size : 41,7 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789400907478
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.
Author : J.F. Rabek
Publisher : Springer Science & Business Media
Page : 679 pages
File Size : 45,6 Mb
Release : 2012-12-06
Category : Technology & Engineering
ISBN : 9789401112741
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.
Author : Anonim
Publisher : iSmithers Rapra Publishing
Page : 138 pages
File Size : 46,9 Mb
Release : 2024-06-28
Category : Electronic
ISBN : 8210379456XXX
Author : Jan F. Rabek
Publisher : Springer Science & Business Media
Page : 222 pages
File Size : 45,6 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642800900
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.
Author : Socrates Peter Pappas,Field Howard Winslow,American Chemical Society. Division of Organic Coatings and Plastics Chemistry
Publisher : Unknown
Page : 328 pages
File Size : 44,8 Mb
Release : 1981
Category : Technology & Engineering
ISBN : UCAL:B5118415
Author : Bartosz Tylkowski,Karolina Wieszczycka,Renata Jastrzab
Publisher : Walter de Gruyter GmbH & Co KG
Page : 492 pages
File Size : 53,7 Mb
Release : 2017-09-25
Category : Science
ISBN : 9783110469745
Polymer Engineering focuses on the preparation and application of polymers in several hot topics such as artificial photosynthesis, water purification by membrane technologies, and biodiesel production from wastewater plants. The authors not only describe the latest developments in polymer science, but also support these experimental results by computational chemistry and modelling studies.
Author : N. Nikolai Markovich Emanuel',Anatoliĭ Leonidovich Buchachenko
Publisher : VSP
Page : 358 pages
File Size : 44,6 Mb
Release : 1987-06
Category : Science
ISBN : 9067640921
Author : Norman Grassie,Gerald Scott
Publisher : CUP Archive
Page : 236 pages
File Size : 51,9 Mb
Release : 1988-04-14
Category : Science
ISBN : 0521357977
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.
Author : Dan Rosu,Visakh P. M.
Publisher : Springer
Page : 405 pages
File Size : 49,8 Mb
Release : 2016-11-21
Category : Technology & Engineering
ISBN : 9783319251967
This book offers in-depth insights into the photochemical behavior of multicomponent polymeric-based materials, with a particular emphasis on the photodegradation and photostabilization of these materials. Studying various classes of materials bases such as polysaccharides, wood, synthetic polymers, rubber blends, and nanocomposites, it offers a valuable reference source for graduate and postgraduate students, engineering students, research scholars and polymer engineers working in industry.
Author : John Mills,Raymond White
Publisher : Routledge
Page : 222 pages
File Size : 48,6 Mb
Release : 2012-09-10
Category : Antiques & Collectibles
ISBN : 9781136000027
'The Organic Chemistry of Museum Objects' makes available in a single volume, a survey of the chemical composition, properties and analysis of the whole range of organic materials incorporated into objects and artworks found in museum collections. The authors cover the fundamental chemistry of the bulk materials such as wood, paper, natural fibres and skin products, as well as that of the relatively minor components incorporated as paint, media, varnishes, adhesives and dyes. This expanded second edition, now in paperback, follows the structure of the first, though it has been extensively updated. In addition to chapters on basic organic chemistry, analytical methods, analytical findings and fundamental aspects of deterioration, the subject matter is grouped as far as possible by broad chemical class - oils and fats, waxes, bitumens, carbohydrates, proteins, natural resins, dyestuffs and synthetic polymers. This is an essential purchase for all practising and student conservators, restorers, museum scientists, curators and organic chemists.
Author : Niyazi,Savenkova
Publisher : CRC Press
Page : 195 pages
File Size : 46,6 Mb
Release : 2006-11-14
Category : Technology & Engineering
ISBN : 9789004153622
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).
