Which of the following sets contain only thermoplastics?
A
Glytal, Melmac, PAN
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B
Polythene, Bakelite, Nylon - 6
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C
PVC, PMMA, Polystyrene
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D
Polypropylene, Urea-formaldhyde, Teflon
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Solution
The correct option is C PVC, PMMA, Polystyrene A thermosetting polymer is a polymer which once hardened cannot be reheated and melted to be shaped differently unlike thermoplastic polymer. Examples for both are as below: Thermosetting plastics - Bakelite, Melmac, urea-formaldehyde. Thermoplastics - Glyptal, PAN (polyacrylonitrile), Teflon, Nylon-6, polypropylene, PVC, PMMA, Polystyrene, Polythene.