Question

Which of the following is a polyamide?

• A. Bakelite
• B. Terylene
• C. Nylon-$6,6$
• D. Teflon

Answer 1

The correct option is C

Nylon-$6,6$

Explanation for correct option:

C. Nylon-$6,6$

Polyamide:

• A polyamide is a polymer in which the repeating units are joined by amide bonds.
• The general chemical formula of the amide group is $\mathrm{CO}-\mathrm{NH}$.
• "These polymers possessing amide linkages are important examples of synthetic fibers and are termed as nylons."
• Nylon-6,6 is prepared by the condensation polymerization of hexamethylenediamine with adipic acid at high pressure/high-temperature conditions.
• The chemical reaction can be depicted as:

Explanation for incorrect options:

Bakelite, Terylene, and Teflon do not contain any repeating units joined by amide bonds. Thus options A, B, and D stand incorrect.

Hence, the correct option is C i.e. Nylon-$6,6$.