聚丁二酸丁二醇酯/硅酸钙复合材料的发泡行为  

Foaming Behavior of Poly (butylene succinate)/CaSiO_3 Composite

作　　者：周洪福[1] 孙俊民 何路东 马鹏程 王向东[1] 黄彬[1] 

机构地区：[1]北京工商大学材料与机械工程学院,北京100048 [2]大唐国际高铝煤炭资源开发利用研发中心,内蒙古呼和浩特010050

出　　处：《塑料》2014年第2期51-55,共5页Plastics

基　　金：北京市教委面上项目(KM201310011002);大学生科学研究与创业指导计划(SJ201301005)

摘　　要：利用乙烯基硅烷偶联剂(KH570)对硅酸钙表面进行改性。然后,将其与聚丁二酸丁二酯(PBS)熔融共混,采用差示热扫描量热法和旋转流变仪研究了不同硅酸钙含量和种类对PBS热性能和流变性能的影响。最后,利用超临界二氧化碳作为物理发泡剂对该复合材料进行釜压发泡,并用扫描电子显微镜观察其微观形貌,采用密度计测试其发泡倍率。结果表明:与未改性硅酸钙填充的PBS相比,改性硅酸钙填充PBS的结晶温度和储能模量显著提高,并且随着硅酸钙含量的增加,PBS的结晶温度、复数黏度、储能模量逐渐提高。复合材料泡沫结构呈闭孔且分布均匀。The surface of CaSiO3 was modified by vinyl silane coupling agent KH570. Subsequently, the modified CaSiO3 was blended with poly （butylene suecinate） （PBS） to prepare its nanocomposite. The thermal property and rheological performance of PBS nanoeomposite were tested through differential scanning calorimetry and totational rheometer. Finally, PBS nanocomposite was foamed by using supereritical carbon dioxide as blowing agent in the autoclave. The micromorphology of the PBS foams was observed by scanning electron microscope. The expansion ratio of various PBS foamed sample was tested by density balance. Results indicated that PBS filled with modified CaSiO3 had higher crystallization temperature and storage modulus, compared to PBS filled with unmodified CaSiO3. With increasing the content of CaSiO3, the crystallization temperature,complex viscosity, and storage modulus of PBS nanocomposite were increased. The micromorphology of PBS nanocomposite foam was closed-cell and well distributed.

关 键 词：聚丁二酸丁二醇酯 硅酸钙 复合材料 泡沫 改性 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]