polyamide terpolymer compositions , which contain biobased monomers and are suitable for making shaped articles , are disclosed . comprised of three monomeric species polymerized randomly , including hexamethylene diamine , adipic acid and a bio - based monomer , the compositions are easier to process and have better dye uniformity than polyamides formed from melt - blended biobased components , and are comparable in dyeability , color fastnessand appearance retention performance to non - biobased polyamide copolymers .