关键词: 己二酸共聚物, 天冬氨酸, 液相热缩聚, 聚琥珀酰亚胺

Abstract: Adipic acid copolymer solution was synthesized, using this as liquid medium, the liquid phase pyrocondensation polymerization of aspartic acid was investigated.When the hydroxyl value of the copolymer solution less than 310mgKOH/g and acid value less than 5mgKOH/g, PSI yield was 90.5%—93.4%, more than the yield of 86.8% in the same reaction condition of solid phase pyrocondensation polymerization.The effects of reaction temperature, reaction time and dosage of catalyst on pyrocondensation polymerization of L-ASP have been discussed.When the reaction temperature was 200℃, reaction time was 2 hours, dosage of catalyst was 8%, the yield of PSI was 93.4%, and the optimum reaction conditions were obtained.The number-average molecular weight of PSI was 39956, and molecular weight distribution coefficient was 1.16.This study also analyzed the comparison of infrared spectrum of PSI products from different pyrocondensation polymerization conditions.

Key words: adipic acid copolymer, aspartic acid, liquid phase pyrocondensation polymerization, poly-succinimide