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Recycling of PVC and Mixed Plastic Waste
ChemTec Publishing, Pages: 199
This book, on recycling of PVC and mixed plastic wastes, has been compiled from contributions from an array of scientists from several countries who are playing a leading role in plastic recycling. They offer practical solutions to many difficult problems in this field.
The book is made up of 11 chapters. The first two cover thermal stabilization of PVC which is to be recycled. They deal with the original stabilizer, residual stability of material, and go on to consider additional stabilization which may be required. Several practical and effective ways of recycling PVC are proposed. Data are presented to show that a well designed system can reduce stabilization costs.
The next two chapters deal with successful, commercial operations. In one, fully automated, developed by VEKA in Germany, complete PVC windows containing PVC, glass, metal, and rubber are recycled. No dismantling of the window is needed. Another process, developed by Solvay in Belgium, recycles PVC bottles and pipes and the properties of products made from this recycled material are equal those of the original polymers.
Several chapters are devoted to the technology of processing mixed plastic waste. Emphasis is placed on degradation, morphological structure, molecular weight and branching of component polymers and the effects of these factors on the performance of blends of recycled polymers. Several methods of compatibilization are covered. These include selection of compatibilizers and cost-effective methods of their production. Also method of mechanical dispersion is proposed as an alternative to chemical compatibilization. The blend obtained by this technology has excellent performance characteristics.
The final two chapters review the effect of contamination and UV stability of recycled polymers. Effect of contaminants and methods of their removal are broadly discussed.
Anyone involved in production of materials from virgin polymers who is concerned with their recyclability should read this book. The ideas and data presented will help the process of planning future recycling efforts and help to bring the recycling process from a costly nuisance to a profitable industry.
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