12 Which of the following polymers are used as fiber?
(a) Polytetrafluoroethane
(b) Polychloroprene
(c) Nylon
(d) Terylene
(c, d)
Nylon and terylene are used as fiber due to strong intermolecular forces like H-bonding which lead to close packing in the chain and thus impart crystalline nature.
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