Intermolecular forces in nylon-6,6: the principal interchain bonding in linear polyamide 66 is predominantly which type?

Introduction / Context:
Polyamide properties (strength, crystallinity, melting point) stem from strong interchain interactions. In nylons, amide groups create directional hydrogen bonds between chains.

Concept / Approach:
Unlike covalent crosslinks in thermosets, nylons are thermoplastics whose chains interact via hydrogen bonds (–C=O···H–N–), enhancing order and thermal resistance. Ionic bonding is not the main mechanism here.

Final Answer:
Hydrogen bonding