稀土-钛催化剂上制备的聚(对苯二甲酸丁二醇酯-co-丁二酸丁二醇酯)的结构与性能  

Structure and Properties of Poly(Butylene Terephthalate-co-Butylene Succinate) Copolyesters Synthesized with Rare Earth-Titanium Catalyst

作　　者：朱孝恒[1] 陈伟[1] 祝桂香[1] 吕静兰[1] 张艳霞[1] 张伟[1] 

机构地区：[1]中国石油化工股份有限公司北京化工研究院,北京100013

出　　处：《石油化工》2007年第3期293-297,共5页Petrochemical Technology

摘　　要：采用熔融缩聚法，以稀土-钛复合物为催化剂，以对苯二甲酸二甲酯、1，4-丁二醇和1，4-丁二酸为单体，制备了-系列相对分子质量较大、相对分子质量分布较窄的聚（对苯二甲酸丁二醇酯-co-丁二酸丁二醇酯）共聚酯。采用凝胶渗透色谱、核磁共振、示差扫描量热和广角x射线衍射等手段表征了该系列共聚酯的结构、热性能和结晶性能，并对它们的宏观力学性能及生物降解性进行了分析和描述。实验结果表明，在共聚酯中当脂肪族单元的摩尔分数为60％～80％时，共聚酯具有较好的热性能和力学性能，且具有-定的生物降解性。A series of aliphatic - aromatic copolyesters--poly （ butylene terephthalate - co - butylene succinate） s [ P （BT- BS）], with high relative molecular mass, narrow relative molecular mass distribution and different compositions were synthesized by polycondensation from dimethyl terephthalate, succinic acid and 1,4 - butanediol in presence of rare earth - titanium catalyst. Structural, thermodynamical and crystal properties of the copolyesters were studied by means of ^1H NMR, GPC, DSC and wide- angle X -ray diffraction （WAXD）. Mechanical properties and biodegradability of the copolyesters were also investigated. The aliphatic - aromatic copolyesters not only possessed better thermodynamic and mechanical properties but also kept good biodegradability of aliphatic polyesters by introducing 60% - 80% mole fraction of aliphatic monomer to poly （ butylene terephthalate ） polyesters.

关 键 词：稀土元素 催化剂 脂肪-芳香共聚酯 生物降解 聚对苯二甲酸丁二醇酯 聚丁二酸丁二醇酯 均聚酯 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]