(A) Terylene (also known as Dacron) is a polyester fiber. It is prepared by the condensation polymerization of terephthalic acid $(C_6H_4(COOH)_2)$ an

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(A) Terylene (also known as Dacron) is a polyester fiber. It is prepared by the condensation polymerization of terephthalic acid $(C_6H_4(COOH)_2)$ and ethylene glycol $(HO-CH_2-CH_2-OH)$.The reaction is as follows:$n \ HOOC-C_6H_4-COOH + n \ HO-CH_2-CH_2-OH \rightarrow [-CO-C_6H_4-CO-O-CH_2-CH_2-O-]_n + 2n \ H_2O$