Synthesis and non-isothermal crystallization kinetics of polyamide 66 copolymers containing alicyclic structures.

To further improve the performance of PA66 and expand its applications, a new strategy was proposed to introduce an alicyclic structure into PA66 chain by the copolymerization method. Initially, 3,3'-dimethyl-4,4'-diaminodicyclohexylmethane (MACM) was reacted with 1,6-adipic acid to form MACM6 salt, and then, it was copolymerized with PA66 salt to synthesize PA66/MACM6 copolymers with alicyclic structures. PA66/MACM6 copolymers exhibited good thermal stabilities, and the presence of alicyclic structure had no significant effect on their thermal stabilities.