Polymers: The fibres have strong hydrogen bond. Examples of elastomers :- buna-s , buna - N , neoprene. Examples of the fibres:-polyamide ( nylon 6,6) , polyester ( terelyne). Concept of thermoplastic:- which substance which is soft on heating and hardening on cooling. Examples of thermoplastic are polythene , polystyrene , polyvinyl ....
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