What are polyamides? How is nylon-66 synthesised? Give its uses.

Polyamide: It is synthetic polymers. These polymers possessing amide linkages between the amino group of one molecule with carboxylic group of other molecule, known as polyamide polymers. For example nylon-66 is synthesised from adipic acid and hexamethylene diamine.

Uses: It is used:
(i) in making bristles of brushes.
(ii) in textiles and also poor making sheets. It is blended with wool to make socks and sweaters. (iii) In the manufacture of cords and climbing ropes.