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本工作以反应法制备了SiO_2负载的乙烯丙烯共聚高效Ziegler-Natta催化剂,考察了TiCl_4/Al_2Et_3Cl_3/SiO_2催化体系的催化效率.发现在无MgCl_2及Mg系化合物存在下,使催化活性大大提高.并利用ESR对高效的原因进行了初步探讨,得到了一些有意义的结果.
In this work, a high efficiency Ziegler-Natta catalyst was prepared by the reaction method, and the catalytic efficiency of TiCl 4 / Al 2 Et 3 Cl 3 / SiO 2 catalyst system was investigated. It was found that the catalytic activity was greatly improved in the absence of MgCl 2 and Mg compounds. Using ESR to study the reason of high efficiency, some meaningful results have been obtained.