Which of the following polymers needs HO-CH_2 | vedclass

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(B) The monomer $HO-CH_2-CH_2-OH$ is known as ethylene glycol.It is used in the preparation of Dacron (also known as Terylene).Dacron is a polyester f

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Dacron

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(B) The monomer $HO-CH_2-CH_2-OH$ is known as ethylene glycol.It is used in the preparation of Dacron (also known as Terylene).Dacron is a polyester formed by the condensation polymerization of ethylene glycol and terephthalic acid in the presence of a zinc acetate-antimony trioxide catalyst at $420-460 \ K$.The reaction is: $n \ HO-CH_2-CH_2-OH + n \ HOOC-C_6H_4-COOH \rightarrow [-O-CH_2-CH_2-O-CO-C_6H_4-CO-]_n + 2n \ H_2O$.

Which of the following polymers needs $HO-CH_2-CH_2-OH$ as one of the monomers for its preparation?

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