Question

9.1
Define
1.
Thermoplastics >​

Answer 1

Answer:

A thermoplastic is a material, usually a plastic polymer, which becomes more soft when heated and hard when cooled. Thermoplastic materials can be cooled and heated several times without any change in their chemistry or mechanical properties. When thermoplastics are heated to their melting point, they melt to a liquid.

Explanation:

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Answer 2

Explanation:

denoting substances tgat become plastic on heating and harden on cooling and are able to repeat these processes are called thermoplastics.