摘要
The study concerns the use of MgCl2-supported high-activity Ziegler-Natta catalysts for the polymerization of ethylene.In particular,two types of catalysts were investigated,which were N-catalyst（BRICI）and improved polyethylene catalyst.The effects of catalyst structure on kinetic behavior were examined.The distribution of active centers in these catalysts was investigated by energy dispersive analysis by X-rays（EDAX）,and morphologies of catalyst particles and polymer products were examined by scanning electron microscope（SEM）.Hydrogen response and copolymerization performance were investigated and compared with the two catalysts.The results were correlated with the kinetic behavior of the two catalysts and appropriate models for polymer particle growth were presented.The improved polyethylene catalyst showed higher activity,better hydrogen response and copolymerization performance.
学习为乙烯的聚合使支持 MgCl2 的高活动的 Ziegler-Natta 催化剂的使用担心。特别地，催化剂的二种类型被调查，它是 N 催化剂(BRICI ) 并且改进了聚乙烯催化剂。运动行为上的催化剂结构的效果被检验。在这些催化剂的活跃中心的分发被精力调查由 X 光(EDAX ) 的散分析，和催化剂粒子和聚合物产品的形态学被扫描电子显微镜(SEM ) 检验。氢反应和 copolymerization 性能被调查并且与二催化剂相比。结果与二催化剂的运动行为被相关，为聚合物粒子生长的适当模型被介绍。改进聚乙烯催化剂显示出更高的活动，更好的氢反应和 copolymerization 性能。
