The generic chemical class that includes all “nylons” is correctly referred to as which family of polymers?

Introduction / Context:Nylons are ubiquitous engineering and fibre polymers. Their key structural feature is the amide linkage (–CONH–) repeated along the chain. A clear understanding of this functional group enables correlation with properties such as hydrogen bonding, crystallinity, and moisture absorption.

Given Data / Assumptions:

• Nylons are formed by condensation of amine- and acid-functional monomers or by ring-opening of lactams.
• Amide linkages can form strong intermolecular hydrogen bonds.
• Common nylon types: nylon-6, nylon-6,6, nylon-11, nylon-12, etc.

Concept / Approach:The defining feature of “nylon” is the polyamide backbone. Polyolefins (e.g., polyethylene, polypropylene) lack polar groups; polyacrylates have ester groups; polyurethanes have urethane linkages; polysulfones contain sulfone groups. Thus, “polyamides” is the correct family name for nylons.

Step-by-Step Solution:Identify the repeating linkage in nylon: amide.Map this to the chemical family: polyamides.Select “Polyamides.”

Verification / Alternative check:Standard polymer classifications list nylons under polyamides due to the –CONH– linkage.

Why Other Options Are Wrong:Polyolefins: no amide groups.Polyacrylates: ester functionality.Polyurethanes: urethane/urethane carbamate linkages.Polysulfones: sulfone aromatic linkages.

Common Pitfalls:Using trade names or numeric designations (6, 6,6, 11) without relating them back to the amide-functional class.

Final Answer:Polyamides