增容剂和稀土β成核剂对聚丙烯/硫酸钙晶须复合材料的影响  

Effects of PP-g-MAH and rare earth nucleating agent on polypropylene/calcium sulfate whisker composites

作　　者：魏志勇[1,2] 张万喜[1] 陈广义[1] 梁继才[1] 杨姝[1] 刘炼[2] 王沛[2] 

机构地区：[1]大连理工大学汽车工程学院、工业装备结构分析国家重点实验室,辽宁大连116024 [2]大连海事大学交通与物流工程学院,辽宁大连116026

出　　处：《功能材料》2010年第9期1585-1587,共3页Journal of Functional Materials

基　　金：国家高技术研究发展计划(863计划)资助项目(2009AA03Z319);国家自然科学基金资助项目(50905024)

摘　　要：研究了增容剂聚丙烯接枝马来酸酐(PP-g-MAH)和稀土β成核剂对聚丙烯/硫酸钙晶须复合材料的结晶行为、熔融行为和力学性能的影响。实验结果表明,硫酸钙晶须具有一定的诱导β-晶型的异相成核作用,使聚丙烯结晶温度提高和结晶速率增加。PP-g-MAH提高了结晶温度和晶须的成核能力,降低了β-晶型的含量,不利于β-晶型的生成,并改善了树脂与晶须的界面性能,提高了拉伸强度和冲击性能。稀土β成核剂具有很强的诱导形成β-晶型的异相成核效应,有效地提高了复合材料的冲击性能。Effects of compatibilizer PP-g-MAH and rare earth β-phase nucleating agent on crystallization and melting behavior and mechanical properties of polypropylene/calcium sulfate whisker composites were investigated. It was found that the calcium sulfate whisker had a heterogeneous nucleation effect on the polymer matrix and induced the formation of β-crystal, increasing the peak crystallization temperature and the overall rate of crystallization of PP. PP-g-MAH improved the interfacial compatibility and tensile strength, enhanced the nucleation activity of the whisker in the PP matrix, and increased the content of β-PP. The results showed that rare earth β-phase nucleating agent resulted in dominant β-PP and improved effectively the impact strength.

关 键 词：聚丙烯/硫酸钙晶须复合材料 聚丙烯接枝马来酸酐 稀土Β成核剂 

分 类 号：TQ327[化学工程—合成树脂塑料工业]