Preparation and Optimum Conditions of Polyamide Polyamine Compounds by Polycondensation

In this paper, polyethylenepolyamine and hexanedioic acid were used in the polycondensation reaction for Polyamide-Polyamsne, which is the intermediate product that synthesis of Polyamide-Polyamsne-Epichlorohydrin. The difference and contact between polyethylenepolyamine, diethylenetriamine (DETA) and triethylenetetramine (TAPA) in the polycondensation reaction were compared. The exploration of the polycondensation reaction was discussed. The reaction between polyethylenepolyamine and hexanedioic acid was similar to the reaction between hexanedioic acid and DETA to TAPA. The appropriate conditions of polycondensation reaction were as following: The molar ratio of polyethylene polyamine and hexanedioic acid was 1:1. The polyamide-polyamine were synthesized by keeping 130 ~ 1350C for the first 30min, then increasing to 1600C and keeping for 2h. The solid content was about 50 %. And through theoretical analysis of gel, the degree of polymerization of Polyamine polyamide intermediate increases with increase the degree of reaction.