Question

8) What type of polymer is formed by the condensation of dimethyl terephthalate with 1,4-di(hydroxymethylcyclohexane? OCH3 OH A) polyurethane B) polyamide C) polyester D) polycarbonate E) polyethylene

Answer 1

C) polyester

This reaction forms a polyester polymer. Specifically, the condensation polymerization between dimethyl terephthalate and 1,4-di(hydroxymethylcyclohexane) produces a polyester with the repeat unit shown below:

[Structure of the repeat unit of the polyester]

The key clues are:

-Condensation polymerization of molecules containing alcohol and carboxylic acid/ester groups → forms polyesters

-Dimethyl terephthalate contains ester groups

-1,4-di(hydroxymethylcyclohexane) contains alcohol groups

-The reaction produces a polymer chain connected by ester linkages, indicating a polyester

So the correct answer is C) polyester.