一步法硅烷接枝交联改性聚丙烯的研究  

Research on Modification of Polypropylene by One-step Silane-grafting and Cross-linking Method

作　　者：杨淑静[1] 宋国君[1] 赵云国[1] 谷正[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

出　　处：《中国塑料》2007年第8期37-41,共5页China Plastics

摘　　要：采用反应挤出法一步实现聚丙烯(PP)的硅烷接枝和交联改性,制备出了具有部分交联结构的高熔体强度PP。通过改性前后红外光谱、熔体流动性能、凝胶含量、结晶行为、力学性能和发泡性能的变化考察了改性对材料性能的影响。结果表明,一步法改性后 PP 大分子中引入了硅烷接枝交联结构,使熔体强度、熔体黏度提高,熔体流动速率显著降低,并且体系中出现了高达48%的凝胶;交联结构的引入使 PP 的结晶速率减缓;改性后材料的力学性能有所提高,而发泡性能大大改善,可以获得高质量的泡沫塑料。High-melt-strength polypropylene （PP） was prepared by one-step silane-grafting and partial cross-linking of regular polypropylene through reactive extrusion. The influences of the modification on the properties were investigated by determination in Fourier transformed infrared spectra, melt-flowing properties, gel content, crystallizing performance, mechanical and foaming properties. Due to the silane-grafting and cross-linking, the melt strength and viscosity increased, melt flowing rate decreased significantly and high gel percentage up to 48 % was obtained in the modified PP. After modifying, its crystallization rate decreased due to the cross-linking. The mechanical and foaming properties of PP were improved, high-quality foam was fabricated with the modified PP.

关 键 词：一步法 硅烷接枝交联 高熔体强度聚丙烯 发泡 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]