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Ronan Asked :

30-05-2021 Thermosetters

Q. What is meant by thermosetting plastic?

A. It softens on heating and returns to original hardness on cooling
B. It hardens on heating and retains hardness on cooling
C. It hardens on heating and returns to original hardness on cooling
D. It softens on heating and retains hardness on cooling


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Dapzoi Verified
Commented on 2021-05-30 14:14:42 (IST)
Answer: B

Explanation: Plastics are readily divided into two types based on their thermal behavior. One is thermoplastic and another one is thermosetting. Thermosetting polymers are the polymers that harden on heating and retains hardness on cooling.