【作者】 徐永祥； 徐军； 孙元碧； 刘德华； 郭宝华； 林峰；

【Author】 Xu Yongxiang, Xu Jun, Sun Yuanbi, Liu Dehua, Guo Baohua, Lin Feng(Department of Chemical Engineering, Tsinghua University, Beijing 100084, China) ( Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China)

【机构】 清华大学化工系； 清华大学机械系；

【摘要】 <正> 高分子材料的应用在极大地方便了人们生活的同时也引起了废弃物难以处理易造成环境污染的问题。为此,人们开始开发可完全生物降解的高分子材料。其中,利用可再生资源生产二元酸和二元醇,然后缩合聚合的脂肪族聚酯类化合物因其合成工艺与传统聚酯类似、加工性能优良而引起了广泛的研究兴趣。聚丁二酸丁二醇酯(PBS)是其中熔点较高的一种聚酯,性能优良,但其性能难以满足某些使用要求,一般采取共聚或共混的方法进行改性。聚酯的聚集态结构是影响其机械性能和生物降解性能的主要因素之一。本研究合成了PBS及其共聚酯,并研究了其结晶行为。更多还原

【Abstract】 High molecular weight poly (butylene succinate) (PBS) and poly (butylene succinate-co-propane succinate) (PBSP) were prepared through a polycondensation process. The thermal properties and the condense structure under different crystallization conditions and melting behavior were studied. The crystal structures of polyesters determined by WAXD are the same as PBS homopolymer. The isothermal crystallization of polyesters was also studied, and the crystal structures were not affected by crystallization temperatures. But the melting behavior and the morphology of spherulites were influenced by crystallization temperatures. In-situ FTIR was also used to study the change from the melting state to condense.更多还原