Solution:
SOLUTION
Nylon 6,6 or polyamide is a substance obtained from the repeated condensation reaction of Hexamythyline di amine and adipic acid which when undergoes polymerisation gives rives polyamide and water molecules
Nylon 6,6 is a condensation product of adipic acid and hexamethylenediamine

Nylon 6 is a condensation product of only one monomer caprolactum.

Nylon 6,6 is stronger and more resistant to heat as compared to Nylon 6.
Nylon 6,6 is used for making carpets, tyre ropes etc. due to its strength and toughness.
Nylon 6 on the other hand is used for making clothes, nets, threads etc.