不同改性剂对PP/CaCO_3复合材料结晶和动态力学性能的影响Effects of Different Modifiers on the Crystallization andDynamic Mechanical Properties of PP/CaCO_3 Composites
朱德钦;生瑜;童庆松;邹寅将;
摘要(Abstract):
以马来酸酐(MAH)、聚丙烯蜡(PPW)为主要原料,采用原位固相接枝改性法制得PP/Ca-CO3-MAH-PPW复合材料,对改性CaCO_3进行表面性能分析,并与PP/PP-g-MAH/CaCO_3复合材料进行结晶、动态力学和耐热性能的比较.结果表明,CaCO_3经原位固相接枝改性后,表面极性减弱,与PP的界面张力降低、相容性提高; CaCO_3表面的PPW层虽会阻碍CaCO_3的异相成核作用,但其可使复合材料形成适宜的界面粘接,有利于材料韧性的提高; CaCO_3-MAH-PPW可降低基体分子链的缠绕程度,增加其柔顺性,使复合材料玻璃化转变温度下降. PP-g-MAH的存在有助于提高PP/PP-g-MAH/CaCO_3复合材料的结晶温度,与基体形成较强的界面粘接,提高复合材料的模量、强度以及耐热性能.
关键词(KeyWords): 聚丙烯;碳酸钙;性能;原位固相接枝改性;聚丙烯接枝马来酸酐
基金项目(Foundation): 福建省科技厅高校产学合作项目(2018Y4001、2015Y4003)
作者(Authors): 朱德钦;生瑜;童庆松;邹寅将;
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