Chemistry Industrial Chemistry PMDC Conceptual Practice
PMDC Verified Question 31 of 41
Which of the following commercial synthetic polymers is classified structurally as a copolymer?
A
Polystyrene
B
Polyvinyl acetate
C
Polyamide (Nylon-6,6)
D
Polyvinyl chloride
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Polyamide (Nylon-6,6)
Concept:

A copolymer is synthesized from two or more chemically distinct monomer species, whereas a homopolymer is derived from a single monomer type.

Formula / Reaction:

$$n\,\text{H}_2\text{N}(\text{CH}_2)_6\text{NH}_2 + n\,\text{HOOC}(\text{CH}_2)_4\text{COOH} \longrightarrow -[\text{HN}(\text{CH}_2)_6\text{NHCO}(\text{CH}_2)_4\text{CO}]_n- + 2n\,\text{H}_2\text{O}$$

Solution:

  • Nylon-6,6 is a copolymer synthesized from two distinct monomers: hexamethylenediamine and adipic acid.


Why other options are incorrect:

  • Polystyrene: A homopolymer formed entirely from styrene.


  • Polyvinyl acetate (PVAc): A homopolymer formed entirely from vinyl acetate.


  • Polyvinyl chloride (PVC): A homopolymer formed entirely from vinyl chloride.

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