HARDMCQ SINGLEIChO (Chemistry Olympiad)Organic ChemistryPolymersAchiever Section
Which of the following sets contains only thermoplastics?
A.Polythene, Bakelite, Nylon 6
B.Glyptal, Melmac, PAN
C.PVC, PMMA, Polystyrene✓ Correct
D.Polypropylene, urea-formaldehyde, Teflon
Explanation
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.
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