以丁二酸、丁二醇、聚四氢呋喃醚(PTMO)和柠檬酸为原料,采用熔融缩聚法合成了微交联聚丁二酸丁二醇酯/聚四氢呋喃醚(c-PBS/PTMO)嵌段共聚物,其中PTMO质量分数为50％.采用核磁共振(1H-NMR)对其结构进行了表征;采用差示扫描量热(DSC)、乌氏黏度计和流变性能测试仪对其结晶熔融性能和流变力学行为进行了研究.研究表明,当加入的柠檬酸质量为PBS质量的1％时,聚合物凝胶含量为20.3％,特性黏数增加38％;使PBS硬段结晶熔融温度降低8.4℃,熔融焓、结晶焓和结晶度分别降低3.1 J/g、6.4 J/g和5.7％,但对PTMO软段影响较小;使嵌段共聚物的剪切储能模量和复数黏度提高,而损耗角tanδ降低.表明少量的柠檬酸的引入,有利于提高c-PBS/PTMO嵌段共聚物的熔体强度.
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