采用齐格勒-纳塔催化剂原位聚合制备反式聚异戊二烯/多壁碳纳米管/二氧化硅纳米复合材料

trans-polyisoprene/multi.walled carbon nanotubes/silica nanocomposites prepared by in situ Ziegler-Natta polymerization

采用齐格勒-纳塔催化剂原位聚合制备了聚异戊二烯(TPI)/多壁碳纳米管(MWCNTs)/二氧化硅(SiO2)纳米复合材料。通过将钛系齐格勒-纳塔催化剂引入到MWCNTs/SiO2/氯化镁载体中,得到了纳米尺度的负载型催化剂体系,该催化剂中MWCNTs可以实现有效的分散,随着TPI聚合反应的进行,MWCNTs实现了在TPI纳米复合材料中的均匀分布且具有较强的界面作用。扫描电镜分析结果显示,在TPI基质中纳米级的MWCNTs可以实现良好的分散,且TPI分子链包覆在MWCNTs表面。通过傅里叶变换红外光谱、核磁共振氢谱和X射线衍射等手段研究了基质的分子结构,表明反式-1,4-结构摩尔分数可达99%。通过加入少量MWCNTs,TPI/MWCNTs/SiO2纳米复合材料的力学性能和电导率明显提高。

This paper reports the first example of preparation of trans-polyisoprene (TPI)/muhi-waUed carbon nanotubes (MWCNTs)/silica (SlOe)nanocomposites via in situ Ziegler-Natta polymerization.A TiCl4 of Ziegler-Natta catalyst species was incorporated into MWCNTs/SiO2/MgCl2 carrier via surface functional groups including-OH,giving a supported catalyst system primarily structured by nanoscale,primarily causing MWCNTs dispersed effectively.