文献类型：期刊文献

英文题名：Modification of Si/Mg Composite Supported Ziegler-Natta Ti-based Catalysts for Propylene Polymerization Using the Third Metal Elements

作者：Zhu, Wei[1];Tian, Zhou[2];Jiang, Pingkai[3];Liu, Boping[4]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Meilong Rd 130, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Minist Educ, Key Lab Adv Control & Optimizat Chem Proc, Meilong Rd 130, Shanghai 200237, Peoples R China;[3]Shanghai Jiao Tong Univ, Shanghai Key Lab Elect Insulat & Thermal Aging, Dept Polymer Sci & Engn, Shanghai 200240, Peoples R China;[4]South China Agr Univ, Coll Mat & Energy, 483 Wushan Rd, Guangzhou 510642, Guangdong, Peoples R China

年份：2018

卷号：35

期号：3

起止页码：265

外文期刊名：JOURNAL OF POLYMER MATERIALS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000463891200002)】；

基金：The authors gratefully thank the financial supports by the National Basic Research Program of China (973 Program) (No. 2014CB239503), the National Natural Science Foundation of China (No. 21674036), and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Polypropylene; Ziegler-Natta catalyst; Metal doped; Internal donor; Kinetics (polym.) curves

摘要：In this study, several (SiO2/MgO/ID/MClx/MgCl2)center dot TiClx Ziegler-Natta Catalysts are synthesized by a co-impregnation method to study a third metal (Zr, V, Fe, Mn, W) effect on catalytic performance in propylene polymerization. When the metal doping content is 10 wt% (compare to magnesium elements), the activity of W doped catalyst shows 60.0% higher. While the activity of Zr, V, Fe and Mn doped catalyst both decreased. Correlations of the catalyst activities with the iron radius and the electronegativity of the third metal elements are discussed. In the same doping content condition, metals have similar radius with Mg2+ have higher activity (Fe, Mn and W > V and Zr). The mechanism of Mn and W effects are discussed. The activity of 5 wt% and 3 wt% Mn doped catalyst is higher compared with the catalyst without doping. It means that the doping content also have an influence on the catalyst performance.