刘忠柱;秦琦;李睢水;郑国强;米立伟;

• 1:中原工学院材料与化工学院
• 2:郑州大学材料科学与工程学院

摘要(Abstract)：

通过挤出-拉伸法分别制备了iPP和β成核剂改性iPP薄膜,研究了β成核剂和拉伸速率对薄膜结晶行为和力学性能的影响。采用二维广角X射线衍射、二维小角X射线散射、差示扫描量热法、扫描电镜(SEM)和拉伸试验对薄膜微观结构和力学性能进行了相关分析测试。结果表明:β成核剂的加入使得iPP薄膜中的晶型发生改变;当β成核剂质量分数为0.2%且拉伸速率为30cm/min时,薄膜内部β晶发生明显支化现象,并且在其内部至少形成了三种不同形貌的β晶;试样的断裂伸长率和韧性均增大;随着拉伸速率的增加,试样中β晶含量减小。

关键词(KeyWords)： 等规聚丙烯;β成核剂;拉伸速率;结晶行为;力学性能

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 刘忠柱;秦琦;李睢水;郑国强;米立伟;

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