question_answer

Which one of the following is an example of a thermosetting polymer?                     [AIPMT 2014]

A) \[-(C{{H}_{2}}-\underset{\underset{\text{Cl}}{\mathop{|}}\,}{\mathop{C}}\,=CH-C{{H}_{2}}){{-}_{n}}\]

B) \[-(C{{H}_{2}}-\underset{\underset{\text{Cl}}{\mathop{|}}\,}{\mathop{C}}\,H){{-}_{n}}\]

C) \[-(\overset{\overset{H}{\mathop{|}}\,}{\mathop{N}}\,-{{(C{{H}_{2}})}_{6}}-\overset{\overset{\text{H}}{\mathop{|}}\,}{\mathop{N}}\,-\overset{\overset{\text{O}}{\mathop{|\,\,|}}\,}{\mathop{C}}\,-{{(C{{H}_{2}})}_{4}}-\overset{\overset{\text{O}}{\mathop{|\,\,|}}\,}{\mathop{C}}\,){{-}_{n}}\]

D)

Correct Answer: C

Solution :

[c] Novolac, a condensation polymer of phenol and formaldehyde is a thermosetting polymer.

Neoprene rubber  and are thermoplastic polymers while nylon-66   is a polyamide which is commonly known as  fibre.