PVC/CPE/CaCO_3复合材料的力学性能  

Mechanical Properties of PVC/CPE/CaCO_3 Composites

作　　者：陈韶辉 宋义虎[1,2] 都佩华[1] 朱肖楠 郑强[1,2] 

机构地区：[1]高分子合成与功能构造教育部重点实验室,浙江大学高分子科学与工程学系,浙江杭州310027 [2]国家复合改性聚合物材料工程技术研究中心,贵州贵阳550014

出　　处：《材料科学与工程学报》2011年第6期829-832,845,共5页Journal of Materials Science and Engineering

基　　金：国家科技支撑计划资助项目(007BAE10B04)

摘　　要：以聚氯乙烯（PVC）为基体,采用熔融共混法制备了PVC/氯化聚乙烯（CPE）合金和PVC/CPE（12 phr）/碳酸钙（CaCO3）三元复合材料,考察了CaCO3表面改性及改性剂含量对复合材料拉伸与冲击力学性能的影响。结果表明,填充CaCO3会降低复合材料拉伸屈服强度与冲击韧性。对微米CaCO3进行表面改性,可有效限制复合材料韧性的降低。在表面改性微米CaCO3填充量为48wt%、CPE含量为12 phr时,复合材料屈服强度约33 MPa,冲击强度为硬质PVC的4.7~5.0倍。Polyvinyl chloride（PVC）/chlorinated polyethylene（CPE）/calcium carbonate（CaCO3） ternary composites with PVC as the matrix,CPE as a toughness modifier and CaCO3 as a filler were prepared by using melt compounding method.Influences of surface modification and CaCO3 content on mechanical properties of the ternary composites were discussed.The results showed that both tensile yield strength and impact toughness of the composites decrease with increasing CaCO3 content.However,surface modification of micro-sized CaCO3 allowed the prepared composites to have a higher impact toughness than those with unmodified CaCO3.The composites modified with 48 wt% micro-sized CaCO3 and 12 phr CPE exhibited yield stress of about 33 MPa and impact strength 4.7~5.0 times higher than that of rigid PVC.

关 键 词：聚氯乙烯 氯化聚乙烯 碳酸钙 表面处理 力学性能 

分 类 号：TQ322.2[化学工程—合成树脂塑料工业] TQ325.3