question_answer

When glycol is heated with dicarboxylic acid, the products are

A)                 Polyesters          

B)                 Polyethers

C)                 Polyethylene    

D)                 No reaction at all

Correct Answer: A

Solution :

           n (HOOC                      COOH ) +  \[n\underset{\text{Ethylene}\,\text{glycol}}{\mathop{\left( \underset{C{{H}_{2}}-OH}{\overset{C{{H}_{2}}-OH}{\mathop{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}}\, \right)}}\,\]                                 \[\left( \underset{\,\,O}{\overset{-C}{\mathop{\,\,\,\,||}}}\, \right.\]                    \[\underset{\text{Polyster}}{\mathop{{{\left. \underset{O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\overset{C-O-C{{H}_{2}}-C{{H}_{2}}-O-}{\mathop{||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}}\, \right)}_{n}}}}\,\]