(i)Terylene is formed by reaction between ethylene glycol and
Terephthalic acid losing water molecles. This is an examole of condensation polymers.
(ii) On heating formaldehyde with Novalc undergoes cross linked polymers called Bakelite.
(iii)Buna-S is a copolymer made by addition of 1,3-butadiene and styrene.
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