Question

Which type of materials soften on heating and regains its original shape on cooling?

(a) Thermoplastics

(b) Thermosetting

(c) Rubber

(d) All of the mentioned

I got this question by my college director while I was bunking the class.

This interesting question is from Polymer Chemistry Introduction in division Principles of Polymer Chemistry of Unit Processes

Answer 1

Right option is (a) Thermoplastics

Easiest explanation: Some of them soften upon heating and regain their original hardness upon subsequent cooling, whereby the heating and cooling cycle can be repeated at will. These materials are called thermoplastics.