癸二酸／对苯二甲酸系共聚酯的合成及耐热性能研究

摘要

Copolyesters of sebacic/terephthalic acid series was synthesizedby the condensation polymerization of sebacic acid and terephthalic acid with ethanediol and ne opentyl glycol. The influence of reaction temperature, catalysts and vacuum tightness on condensation polymerization were discussed. The relationship between the structure and thermal stability of the copolyesters were studied by WAXD、DSCa nd TGA. It is shown that the crystallinity and melting point of copolyesters decreased with increasing content of terephthalic acid or neopentyl glycol respectively, but its heat-resistant properties are obviously enhanced.Key words：sebacic acid; terephthalic acid; copolyester; crystallinity; thermal stability%论文采用癸二酸、对苯二甲酸与乙二醇、新戊二醇进行缩聚反应，合成了癸二酸/对苯二甲酸系共聚酯.定性讨论了反应温度、催化剂的种类和真空度等对缩聚反应的影响.通过WAXD、DSC和TGA等方法，研究了共聚酯的结构与耐热性能的关系.结果表明：共聚酯的结晶度和熔点随着体系中对苯二甲酸或新戊二醇的含量增加而下降，而耐热性能则明显提高.