Question

Nylon-4 is made by the polymerisation of

• A. 2-pyrrolidine
• B. Dodecalactum
• C. Amino undecanoic acid
• D. None of the above

Hint:

Ring-opening polymerisation of lactams produces different nylons depending on the number of carbon atoms.

Answer 1

The Correct Option is A

Step 1: Understanding nylon nomenclature.
The number in nylon (e.g., Nylon-4) indicates the number of carbon atoms present in the monomer unit used for polymerisation.
Step 2: Identifying the correct monomer.
Nylon-4 is produced by ring-opening polymerisation of 2-pyrrolidone (commonly written as 2-pyrrolidine in some texts). It contains four carbon atoms in the repeating unit.
Step 3: Eliminating incorrect options.
Dodecalactum is used for Nylon-12, and amino undecanoic acid is used for Nylon-11.
Step 4: Conclusion.
Hence, Nylon-4 is made by the polymerisation of 2-pyrrolidine.