聚丙烯微球制备及其结晶动力学分析  

Preparation of Polypropylene Microsphere and Crystallization Dynamics Analysis

作　　者：海士坤[1] 张雅琪 张伟娜 柳彦梅[1] 范利丹[3] 于翔 

机构地区：[1]商丘医学高等专科学校公共学科部,河南商丘476100 [2]河南工程学院材料与化学工程学院,河南郑州450007 [3]河南理工大学土木工程学院,河南焦作454001

出　　处：《塑料》2018年第1期95-99,117,共6页Plastics

基　　金：河南省教育厅2018年河南省高等学校重点科研项目(18A430024)

摘　　要：采用溶液重结晶法制备了微米尺度的聚丙烯微球,利用扫描电镜、激光粒度分析仪、示差扫描量热仪等测试方法,考察了重结晶温度对微球性能的影响,分析了聚丙烯在二甲苯中的等温和非等温结晶动力学。研究发现,聚丙烯颗粒的形貌与粒径均随重结晶温度的变化存在明显的差异,聚丙烯微球内部的α晶结晶度随重结晶温度的升高也在发生变化。聚丙烯在二甲苯中的结晶动力学描述了聚丙烯的结晶行为,阐述了高温形成片晶堆积体的原因,有利于验证微球的形成机理,改进制备工艺。Polypropylene microspheres in micrometer scale were successfully prepared with recrystallization method. The effect of recrystallization temperature on microspheres, isothermal and non-isothermal crystallization dynamics were carefully studied with scanning electron microscopy, laser particle size distribution instrument, differential scanning calorimetry and so on. The results showed that the particle morphology and diameter became largely different when recrystallization temperature was changed. The a crystal crystallinity in microspheres also changed gradually with increasing recrystallization temperature. Crystallization dynamics of polypropylene in xylene described the propylene crystallization behavior and illustrated why the lamellae stacks were formed at high temperature, which was good for proving the mechanism of microsphere formation and revising the manufacturing procedure.

关 键 词：聚丙烯微球 溶液重结晶法 结晶动力学 结晶度 粒径 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]