Question

20
The number of thermosetting plastics given in
the following:
Bakelite, polythene, PVC, polyurea, terylene,
melamine, polystyrene, duroplast​

Answer 1

Answer:

Thermoplastics can be heated and shaped over and over again while thermosetting plastics can only be heated and shaped once.

Melamine resin or melamine formaldehyde (also shortened to melamine) is a hard, thermosetting plastic material made from melamine and formaldehyde by polymerization.

While polyethene is a thermoplastic polymer consisting of long hydrocarbon chains, PVC or Polyvinyl chloride, is also a thermoplastic produced by polymerization of vinyl chloride monomer (VCM) and nylon belongs to a class of polymers called polyamides is also a thermoplastic.