表面处理剂对硫酸钙晶须/聚丙烯复合材料的增韧(Ⅰ)  

Toughening of Calcium Sulfate Whisker-PP Composite by Surface Treatment Agents

作　　者：王晓丽[1] 朱一民[1] 韩跃新[1] 袁致涛[1] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2008年第10期1494-1497,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50502011)

摘　　要：用两种表面处理剂对硫酸钙晶须进行改性,并将其添加到聚丙烯(PP)中制备出了硫酸钙晶须/PP复合材料,对该复合材料的力学性能进行了测试.结果发现:将硫酸钙晶须引入聚丙烯体系后,聚丙烯的冲击强度有显著提高;采用钛酸酯NDZ-401对硫酸钙晶须进行改性时,当晶须的质量分数为10%时,体系的冲击强度能提高85%以上.用扫描电镜(SEM)对复合材料的冲击断面形貌和硫酸钙晶须在基体中的分散性进行了观察.结果表明:表面处理能够促进硫酸钙晶须在基体中的均匀分散,很大程度上提高复合材料的冲击强度,改善材料的韧性.表面处理剂对PP/硫酸钙晶须复合体系起到了一定的增韧作用.Calcium sulfate whiskers were modified by two kinds of surface treatment agents and added into polypropylene to prepare the calcium sulfate whisker-PP composite, of which the mechanical properties were tested. The results showed that the notched impact strength of the composite on izod tester increases dramatically after adding calcium sulfate whiskers. When 10 % of the calcium sulfate whiskers in the composite was modified by the titanates NDZ - 401, the notched impact strength of the composite is increased by over 85 %. SEM was utilized to observe the morphology of impact fracture surface of the composite and dispersion of calcium sulfate whiskers in PP matrix. The results indicated that surface treatment can step up the uniform dispersion of calcium sulfate whiskers in PP matrix, and the notched impact strength to improve greatly the toughness of the composite. In this respect the surface treatment agents play a positive role.

关 键 词：硫酸钙晶须 聚丙烯 表面处理剂 缺口冲击强度 增韧 

分 类 号：TD985[矿业工程—选矿]