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Define thermoplastics and thermosetting ...

Define thermoplastics and thermosetting polymers with two example of each.

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Thermoplastic Polymers : These are the linear (or) slightly branched long chain molecules capable of softening on heating and hardening on cooling .E.g. : Polystyrene, Polythene.
Thermo setting polymers : These polymers are cross linked (or) heavily branched molecules which on heating undergo extensive cross linking in moulds and again become infusible. E.g : Bakelite , urea-formaldehyd , resin etc..........
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