Introduction to Plastics Recycling 2nd ed - V. Goodship - Smithers Rapra Press, Polymers
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Introduction to
Plastics Recycling
Second Edition
Vannessa Goodship
Introduction to
Plastics Recycling
Second Edition
Vannessa Goodship
Smithers Rapra Technology Limited
A wholly owned subsidiary of The Smithers Group
Shawbury, Shrewsbury, Shropshire, SY4 4NR, United Kingdom
Telephone: +44 (0)1939 250383 Fax: +44 (0)1939 251118
First Edition Published in 2001
Second Edition Published 2007
Smithers Rapra Technology Limited
Shawbury, Shrewsbury, Shropshire, SY4 4NR, UK
©2007, Smithers Rapra Technology Limited
All rights reserved. Except as permitted under current legislation no part
of this publication may be photocopied, reproduced or distributed in any
form or by any means or stored in a database or retrieval system, without
the prior permission from the copyright holder.
A catalogue record for this book is available from the British Library.
Every effort has been made to contact copyright holders of any material
reproduced within the text and the authors and publishers apologise if
any have been overlooked.
ISBN: 978-1-84735-078-7
Typeset by Smithers Rapra Technology Limited
Cover printed by Livesey Limited, Shrewsbury, UK
Printed and bound by Smithers Rapra Technology Limited
C
ontents
2.
Back to Basics..................................................................11
2.1 Polymers ................................................................11
2.2 Thermoplastics ......................................................15
2.2.1 Polyolefi ns ............................................. 16
2.2.2 Polyamides ............................................ 16
2.3 Thermosets ............................................................17
2.4
The Formulation of Plastics ...................................19
2.5
Why Does Recyclate Always Seem to be Black?.....21
2.6
What Are Recyclates Used For? .............................21
3.
The Effects of Processing on Thermoplastics ...................25
3.1 Rheology ...............................................................25
3.2 Heat ......................................................................28
3.3
Physical and Chemical Changes .............................31
3.4
Assessing Property Deterioration Caused by
Repeated Cycling by Injection Moulding ..............32
3.5
Short-Term Mechanical Testing ............................35
3.5.1
Tensile Testing ...................................... 35
3.5.2
Impact Testing ...................................... 37
i
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