There are some plastics that when moulded once cannot be softened by h – McqOptions

MCQOPTIONS

1.	There are some plastics that when moulded once cannot be softened by heating. These are called_______.
A.	thermoplastic polyurethanes (TPU)
B.	high-density polyethylene (HDPE)
C.	polyvinyl chloride
D.	thermosetting polymers
Answer» E.

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