Question

explain the types of plastics in brief

Answer 1

thermoplastic - which can be moulded again and again.
themosetting plastic - which cannot be moulded again

Answer 2

thermoset or thermosetting plastics. once cooled and hardened, these plastics retain their shapes and can't return to their original form. they are hard and durable . thermosets can be used for auto parts, air craft parts and tires . example include polyurethanes , polyester, epoxy resins and phenolic resins