论文部分内容阅读
用反应法(MgCl_2/ROH/TiCl_4)合成MgCl_2载体Ziegler-Natta催化剂已被聚烯焊工业越来越广泛的接受。这不仅是因为这种催化剂体系具有高活性,用于α-烯烃聚合能得到高等规度的聚合物;而且比用研磨法制备催化剂易于控制操作条件,合成这种催化剂的关键步骤是醇溶解MgCl_2,再在低温下与TiCl_4反应。放出HCl和形成Ti(OR)Cl_3的同时,MgCl_2再次从溶液中沉淀出来而得到很好的载体。过去,曾从不同
The Ziegler-Natta catalyst for the synthesis of MgCl 2 supports by the reaction method (MgCl 2 / ROH / TiCl 4) has been accepted more and more by the polyolefine welding industry. This is not only because of the high activity of this catalyst system for the polymerization of α-olefins to obtain higher-order polymers; and the preparation of the catalyst is easier to control operating conditions than milling. The key step in the synthesis of this catalyst is the dissolution of MgCl 2 , And then react with TiCl 4 at low temperature. At the same time that HCl is released and Ti (OR) Cl_3 is formed, MgCl 2 is again precipitated from the solution to obtain a good carrier. In the past, from different