Question

Which of the following statements is/are CORRECT?
1/ Thermoplastics are a class of polymers that will not decompose at temperatures as great as 700 C.
2/ Thermosetting plastics harden when heated, but they regain their elasticity when cooled.
3/ Elastomers are materials that spring back to their original shape when stretched.
A.1 only
B.2 only
C.3 only
D.1 and 2
E.1, 2, and 3

Answer

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