Mechanisms of Polymer Degradation and Stabilisation

1. Front Matter

   Pages i-x

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2. A Theoretical Approach to the Optimisation of Antioxidant Action

   • E. T. Denisov

   Pages 1-22

3. Mechanisms of Antioxidant Action of Phosphite and Phosphonite Esters

   • Klaus Schwetlick

   Pages 23-60

4. Antioxidant Mechanisms of Derivatives of Dithiophosphoric Acid

   • S. Al-Malaika

   Pages 61-107

5. Polymers and High-Energy Irradiation: Degradation and Stabilization

   • D. J. Carlsson, S. Chmela

   Pages 109-133

6. Photodegradation and Stabilization of PPO® Resin Blends

   • James E. Pickett

   Pages 135-167

7. Photo-oxidation and Stabilization of Polyethylene

   • François Gugumus

   Pages 169-209

8. Analysis of Antioxidants and Light Stabilisers in Polymers by Modern Liquid Chromatography

   • Dan Munteanu

   Pages 211-314

9. Back Matter

   Pages 306-329

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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.

• Polyethylen
• liquid
• polymer
• polymers
• spectroscopy

• Aston University, Birmingham, UK

  Gerald Scott

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