文献类型：期刊文献

英文题名：A Novel (SiO2/MgO/MgCl2)?TiClx Ziegler-Natta Catalyst for Ethylene and Ethylene/1-Hexene Polymerization

作者：Wang, Jingwen[1];Cheng, Ruihua[1];He, Xuelian[1];Liu, Zhen[1];Tian, Zhou[1];Liu, Boping[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2015

卷号：216

期号：13

起止页码：1472

外文期刊名：MACROMOLECULAR CHEMISTRY AND PHYSICS

收录：;EI(收录号：20152400929037);WOS:【SCI-EXPANDED(收录号:WOS:000357336900013)】；

基金：The authors would like to thank the financial supports by the National Natural Science Foundation of China (Grant Nos. 21104019 and 21274040) and the National High Technology Research and Development Program 863 (Grant No. 2012AA040306). This work is also financially supported by the Fundamental Research Funds for the Central Universities, research program of Introducing Talents of Discipline of university (B08021). Thanks to Mr. Jialong Zhang for his kind help with the DFT calculations.

语种：英文

外文关键词：copolymerization; polymer kinetics; polyoefins; Ziegler-Natta polymerization

摘要：A novel (SiO2/MgO/MgCl2)TiClx Ziegler-Natta catalyst for ethylene and ethylene/1-hexene polymerization is successfully developed through impregnation of aqueous solution of water-soluble Mg-compounds such as magnesium acetate on silica gel, and forming a supported thin layer of magnesium oxide on the surface of SiO2 after high temperature calcination in dry air or oxygen, followed by further reacting with titanium tetrachloride to synthesize the magnesium dichloride carrier in situ and to support the titanium species simultaneously. The method is relatively simple and the resulting catalysts exhibit high activity, good hydrogen response, and copolymerization ability with high 1-hexene incorporation. Unlike the traditional industrial Ti/Mg Ziegler-Natta catalysts using the relatively expensive, anhydrous and moisture-sensitive MgCl2, Mg(OEt)(2), MgR2 or RMgCl as Mg-sources, the most unique feature of this novel catalyst is its capability of utilization of any soluble Mg-compounds and thus shows great potential for application in commercial gas-phase polyolefin processes.