Nylon is a polyamide polymer and has a general chemical structure of two six-monomer carbon chains connected with a COOH group on one end and an amino group, or NH2, on the opposite end. The two monomers that create nylon can be propagated to create long polymer nylon chains.
Nylon comes in two different forms, nylon-6,6 and nylon-6. The six in both forms refers to the number of carbons found in the monomer chains of the polymer. Nylon-6,6 is comprised of two monomer chains that each contain six carbons, while Nylon-6 is comprised of one monomer chain of six carbons.