Antioxidant Polymers
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Antioxidant Polymers
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Author : Giuseppe Cirillo
language : en
Publisher: John Wiley & Sons
Release Date : 2012-06-07
Antioxidant Polymers written by Giuseppe Cirillo 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 2012-06-07 with Technology & Engineering categories.
Antioxidant Polymers is an exhaustive overview of the recent developments in the field of polymeric materials showing antioxidant properties. This research area has grown rapidly in the last decade because antioxidant polymers have wide industry applications ranging from materials science to biomedical, pharmaceuticals and cosmetics.
Antioxidant Polymers
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Author : Giuseppe Cirillo
language : en
Publisher: Wiley-Scrivener
Release Date : 2012-06-05
Antioxidant Polymers written by Giuseppe Cirillo and has been published by Wiley-Scrivener this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-06-05 with Technology & Engineering categories.
Antioxidant Polymers is an exhaustive overview of the recent developments in the field of polymeric materials showing antioxidant properties. This research area has grown rapidly in the last decade because antioxidant polymers have wide industry applications ranging from materials science to biomedical, pharmaceuticals and cosmetics.
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.
Handbook Of Antioxidants
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Author : George Wypych
language : en
Publisher: Elsevier
Release Date : 2020-03-06
Handbook Of Antioxidants written by George Wypych and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-03-06 with Science categories.
Handbook of Antioxidants provides a wealth of information on the mechanics, practical effects and applications of a wide range of antioxidants. The book starts by introducing the general concepts relating to antioxidants and their application, then segues into a discussion on existing natural and synthetic antioxidants, characterizing their general properties and application. Formation and action of oxidizing species in living organisms, ambient air, industrial environments, and chemical reactions are covered next. Subsequent chapters cover the theories and mechanisms of stabilization, performance indicators, antioxidant selection, degradation and stabilization of different polymers and rubbers, specific effects on other components of formulation, and analytical methods. This book is an excellent companion to the Databook of Antioxidants which has also been published recently. Both books supplement each other without repeating the same information – one contains data another theory, mechanisms of action, practical effects and implications of application. Provides theory, mechanisms of action, practical effects and implications of application for an array of antioxidants Looks at different aspects of phenomena occurring when materials are exposed to ambient air which contains oxygen, ozone, singlet oxygen, and other oxidizing species (radicals) Covers natural and synthetic antioxidants, their stability, performance indicators, degradation and stabilization mechanics, and more
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.
Databook Of Antioxidants
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Author : Anna Wypych
language : en
Publisher: Elsevier
Release Date : 2020-03-03
Databook Of Antioxidants written by Anna Wypych and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-03-03 with Technology & Engineering categories.
Databook of Antioxidants is divided into five sections covering general information, physical properties, health and safety considerations, ecological properties and the use and performance of each featured antioxidant. A general information section includes CAS #, common name/synonym, acronym, chemical category, moisture content, and more. The physical properties section features data on state, odor, color (Gardner and Platinum-cobalt scales), acid number, ash contents, and other characteristics. The health and safety section displays data on flashpoint, autoignition temperatures, explosive LEL and UEL, NFPA flammability and reactivity, ingestion, first aid, and beyond. The ecological properties portion of the book contains data on biodegradation probability, aquatic toxicity LC50, and partition coefficients, and the book concludes with a chapter on use and performance considerations with information on manufacturer, outstanding properties, typical applications, recommended dosage, concentration used, food approval, and more. This book is an excellent companion to the Handbook of Antioxidants which has also been published recently. Both books supplement each other without repeating the same information – one contains data another theory, mechanisms of action, practical effects and implications of application. Contains information on each antioxidant that is broken into five sections: General Information, Physical Properties, Health and Safety, Ecological Properties and Use and Performance Includes an introductory chapter in which general indicators of performance are discussed Features a chapter with information on the data fields included in the description of individual stabilizers
Developments In Polymer Stabilisation 8
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Author : G. Scott
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Developments In Polymer Stabilisation 8 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 the present series of publications 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 complementary and ultimately more important objec tive 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 the basis of a firm mechanistic foundation. Research into the role of 'stable' free radicals as antioxidants and stabilisers for polymers has intensified in recent years. Nitroxyl radicals (nitroxides) were the earliest long-lived radicals to be investi gated in detail and Maslov and Zaikov review the developments that have taken place in understanding their reaction mechanisms from the time when they were first investigated in liquid hydrocarbon systems to the present day when their outstanding performance as light stabilisers has been the object of much scientific research. Although some features of their reactivity remain obscure, the authors approach the problem kinetically and indicate the factors limiting their effectiveness.
Developments In Polymer Stabilisation
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Author : Gerald Scott
language : en
Publisher: Elsevier Science & Technology
Release Date : 1979
Developments In Polymer Stabilisation written by Gerald Scott and has been published by Elsevier Science & Technology this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Technology & Engineering categories.
Phenolic Antioxidants And Health Benefits
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Author : U.D. Chavan
language : en
Publisher: Scientific Publishers
Release Date : 2018-02-01
Phenolic Antioxidants And Health Benefits written by U.D. Chavan and has been published by Scientific Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-02-01 with Technology & Engineering categories.
This book is mainly based on the latest research results and applications of phenolic and polyphenolic compounds. Phenolic compounds, ubiquitous in plants, are an essential part of the human diet and are of considerable interest due to their antioxidant properties and potential beneficial health effects. These compounds range structurally from a simple phenolic molecule to complex high-molecular-weight polymers. There is increasing evidence that consumption of a variety of phenolic compounds present in foods may lower the risk of health disorders because of their antioxidant activity. When added to foods, antioxidants control rancidity development, retard the formation of toxic oxidation products, maintain nutritional quality and extend the shelf-life of products. Due to safety concerns and limitation on the use of synthetic antioxidants, natural antioxidants obtained from edible materials, edible by-products and residual sources have been of increasing interest. This contribution summarizes both the synthetic and natural phenolic antioxidants, emphasizing their mode of action, health effects, degradation products and toxicology. In addition, sources of phenolic antioxidants are discussed in detail.
Enzymatic Polymerization Of Phenolic Compounds By Oxidoreductases
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Author : Mohamed Ghoul
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-02-06
Enzymatic Polymerization Of Phenolic Compounds By Oxidoreductases written by Mohamed Ghoul 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 2012-02-06 with Science categories.
The enzymatic polymerization of phenolic compounds has been generating interest in several fields such as food, cosmetics, and pharmaceuticals. These compounds are employed for their antioxidant properties; however, their use is limited by their low solubility and thermal stability. Polymerization can improve their solubility and their thermal stability though and create new properties which are dependent on the molecular mass and the structure of polymers. The reaction yield, the polydispersity, the molecular mass, the structure and the properties of synthesized polymers can be controlled by the mode of control of the reaction and by the reaction conditions. Enzymatic polymerization of phenolic compounds by oxidoreductases analyze the processes used and the key factors (temperature, solvent, origin of the enzyme, structure of the substrate, reactor design, ...) which control the polymerization of phenolic species by these oxidoreductase enzymes in order to obtain polymers with desired characteristics and properties.