高熔体强度聚丙烯结晶行为及其发泡性能  

Crystallization Behavior and Foaming Ability of High-Melt-Strength PP

作　　者：谷正[1,2] 宋国君[1] 杨淑静[1] 杨超[1] 

机构地区：[1]青岛大学高分子材料研究所,山东青岛266071 [2]兰州大学化学化工学院,甘肃兰州730000

出　　处：《塑料》2010年第5期65-67,共3页Plastics

摘　　要：在双螺杆挤出机上采用一步硅烷接枝交联法制得了高熔体强度聚丙烯,采用DSC、偏光显微镜研究高熔体强度聚丙烯的结晶行为、结晶结构和结晶形态。研究结果表明:高熔体强度聚丙烯的结晶温度明显增加,硅烷接枝交联促进了聚丙烯的异相成核,使晶粒细化,高熔体强度聚丙烯的发泡效果明显优于普通PP。High-melt-strength PP was prepared by one step silane-grafiing and cross-linking of isotactic PP with two-screw extruder. Crystallization behavior, crystallization structure and morphology of HMSPP were characterized using differential scanning calorimetry （ DSC ） and polarizing microscope. The results showed that the crystallization temperature increased markedly,the grafting and cross-linking of silane could enhance the heterogeneous nucleation of PP, and could make grains refine. Foaming abilities made from HMSPP were much better than the commodity ones.

关 键 词：高熔体强度聚丙烯 结晶行为 发泡性能 接枝交联 硅烷 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]