【摘要】 制备了 Ti Cl4/ Ni(acac) 2 / Mg Cl2 -Si O2 -Zn Cl2 / Al R3复合催化剂 .研究了促进剂四氯化硅 (Si Cl4)和各种聚合条件对乙烯聚合的影响及其表观聚合动力学 .用 DSC、IR、1 3C NMR对聚合产物进行了结构性能的分析和表征 .结果表明 ,促进剂 Si Cl4有很好的提高催化效率的作用 ;Ti Cl4/ Ni(acac) 2 复合催化剂有催化乙烯齐聚和原位共聚功能 ,获得了熔点和结晶度较低的、有一定支化度的中、低密度聚乙烯 .更多还原

【Abstract】 The TiCl 4/Ni(acac) 2 complex catalysts were prepared. The effects of SiCl 4 and polymerization conditions on the polymerization of ethylene and their apparent kinetics parameters have been studied. The products obtained were characterized by DSC, IR and 13C NMR. The results indicated that SiCl 4 could increase the catalytic activity of the catalysts and the polymer obtained have low melting temperatures, crystallinity, density and some branches. The complex catalysts have the function of oligomerization and in situ copolymerization for ethylene.更多还原