Nylon-6 is correctly classified as which type of polymer, considering its repeating linkage and synthesis route?

Introduction / Context:Nylon-6 (polycaprolactam) is a cornerstone engineering plastic and fibre. Correct family identification is essential for anticipating properties such as hydrogen bonding, crystallinity, and moisture uptake.

Given Data / Assumptions:

• Nylon-6 forms via ring-opening of caprolactam.
• Backbone contains amide linkages (–CONH–).
• Thermoplastic behaviour allows melting and remoulding.

Concept / Approach:The amide linkage defines polyamides. Nylon-6 is therefore a polyamide (not a polyester, not a thermoset). Its hydrogen bonding yields relatively high strength and thermal performance among commodity thermoplastics.

Step-by-Step Solution:Note amide functionality.Map amide to “polyamide.”Eliminate thermoset/polyester/polyolefin categories.

Verification / Alternative check:Material datasheets and polymer textbooks list nylon-6 under the polyamide family.

Why Other Options Are Wrong:Thermosetting resin: nylon-6 is thermoplastic.Polyester: different linkage (ester).Polyolefin: hydrocarbon chain without polar groups.

Common Pitfalls:Confusing nylon-6 with PET (a polyester) due to both being fibre-forming.

Final Answer:Polyamide