可降解聚酯酰胺共聚物的合成及其性能研究

摘要

以丁二酸、丁二醇、1,6-己二胺为原料,二丁基二月桂酸锡为催化剂,甲苯二异氰酸酯(TDI)为扩链剂,通过熔融共聚,合成了 M w为40~65 k 的聚丁二酸-丁二醇-1,6-己二胺共聚物,并采用压延成膜法制得聚酯酰胺薄膜.研究了1,6-己二胺含量对聚酯酰胺的热性能、结晶性能、降解性能和流变性能的影响.结果表明,合成了聚酯酰胺,其熔点达到100．97℃,热分解温度为317．85℃；随着1,6-己二胺添加量增加,聚酯酰胺的拉伸强度不断变大,断裂伸长率略有下降；1,6-己二胺的加入并未改变聚酯酰胺的晶型,但降低了其结晶度；1,6-己二胺的加入提高了聚酯酰胺降解性能,而且改善了其流变性能,这有利于聚酯酰胺的成型加工和应用.%Succinic acid-butanediol-1,6-hexamethylenediamine polyester amide copolymers with Mw from 40 000 to 65 000 were synthesized by succinic acid,1,4-butylene and 1,6-hexamethylenediamine,through high temper-ature melt reaction.Meanwhile,the second dibutyl tin laurate was selected as catalyst,and the toluene disocya-nate (TDI)was selected as chain extender.The succinic acid-butylene-adipic amine copolymer films were pre-pared by calendering film-forming method.The influences of the content of 1,6-adipic amine on the copolymer performance of thermal,crystallization,degradation and rheological properties were researched.The results showed that the polyester amide copolymers were synthesized successfully,whose melting point is 100.97 ℃and the thermal decomposition temperature is 317.85 ℃.With the increasing of 1,6-adipic amine,the tensile strength of copolymers increased accordingly,and the elongation at break decreased slightly.1,6-adipic amine did not change the crystal type of copolymer,but the crystallinity of copolymer decreased.With adding the 1,6-adipic amine in copolymer,the degradation performance and rheological properties of the copolymers were im-proved,which is useful for the further processing.