December 2005
Intermediate to advanced
768 pages
17h 57m
English
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6.5 Polymeric (plastic) materials
6.5.1 Polymeric (plastic) materials – introduction
Polymeric materials are conventionally referred to as ‘plastics’. This is a misnomer since polymeric materials rarely show plastic properties in their finished condition; in fact, many of them are elastic. However, during the moulding process by which they are formed they are reduced to a plastic condition by heating them to a temperature above that of boiling water, and it is from this that they get the generic name of plastics.
There are two main groups of polymeric materials:
Thermoplastics These can be softened as often as they are reheated. They are not so rigid as the thermosetting plastic materials but tend to be tougher. Examples of thermoplastic polymeric ...
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