Polyamide copolymer and method of making the same

A method of making a polyamide copolymer includes subjecting a reaction mixture to conditions sufficient to form the polyamide copolymer, the reaction mixture including adduct A and adduct B. Adduct Ais a 1:1 adduct of a diamine having the structure H2N-R1-NH2, or a salt thereof, and an aliphatic diacid having the structure HO-C(O)-R2-C(O)-OH, or a salt thereof. Adduct B is a 1:1 adduct of the diamine having the structure H2N-R1-NH2, or a salt thereof, and an aromatic diacid having the structure HO-C(O)-R3-C(O)-OH, or a salt thereof. At each occurrence, R1 and R2 can be independently a substituted or unsubstituted (C1-C20)alkylene. At each occurrence, R3 can be independently a substituted or unsubstituted (C6-C20)arylene. The molar ratio of adduct A to adduct B in the reaction mixture canbe about 61:39 to about 90:10. 种制备聚酰胺共聚物的方法包含使反应混合物经受足以形成聚酰胺共聚物的条件，所述反应混合物包含加合物A和加合物B。加合物A是具有结构H2N-R1-NH2的二胺或其盐与具有结构HO-C(O)-R2-C(O)-OH的脂肪族二酸或其盐的1∶1加合物。加合物B是具有结构H2N-R1-NH2的二胺或其盐与具有结构HO-C(O)-R3-C(O)-OH的芳香族二酸或其盐的1∶1加合物。在每次出现时，R1