刘晶如,许淑义,俞强

• 1:常州大学 材料科学与工程学院，江苏 常州 213164

摘要(Abstract)：

采用熔融接枝法制备了马来酸酐和苯乙烯多单体熔融接枝无规共聚聚丙烯（MPP），动态流变测试表明无规共聚聚丙烯（PPR）在接枝过程中生成了长支链。以差示扫描量热法（DSC）和Avrami方程分析了PPR及MPP的等温结晶行为，考察了马来酸酐的相对接枝率对MPP等温结晶动力学的影响。结果表明，MPP的结晶速率明显大于PPR，MPP接枝率越高，结晶速率越大。PPR和MPP在较高温度下等温结晶时结晶过程受成核控制，长支链的存在可以促进MPP晶核的形成，从而加快结晶速率。偏光显微镜测试结果显示长链支化结构起到促进异相成核和细化晶粒的作用，随着接枝率的增大，MPP晶粒尺寸越小。

关键词(KeyWords)： 无规共聚聚丙烯;熔融接枝;接枝率;长支链;结晶

Abstract:

Keywords:

基金项目(Foundation): 江苏高校优势学科建设工程资助项目。

作者(Author): 刘晶如,许淑义,俞强

DOI: 10.3969/j.issn.1003-9015.2017.02.023

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