石油化工2011，Vol.40Issue(8)：840-844,5.
MgCl2醇合改性对Ziegler - Natta催化剂活性的影响
Effect of MgCl2 Alcohol-Adduct Modification on Activity of Ziegler-Natta Catalyst
杨俊凤 1范玲婷 1李贺 1吴志祥 1许胜 1米普科1
作者信息
- 1. 华东理工大学材料科学与工程学院,上海 200237
- 折叠
摘要
Abstract
The Ziegler-Natta catalyst system was prepared by the traditional way with anhydrous MgCl2 as the support. The effects of n(ROH): n(Mg), solvent type, alcohol type and alcohol-adduct time on the catalyst preparation and the ethylene polymerization were investigated by the orthogonal method. Under the optimal conditions; n-hexane as the solvent, isobutyl alcohol as the alcohol-adduct modifying agent, n(alcohol): rc(Mg) 3.5, alcohol-adduct time 2.5 h and alcohol-adduct temperature 70 t for the catalyst preparation, and 45 t and n ( Al) : n (Ti) 200 for the ethylene slurry polymerization, the activity of the catalyst system in the polymerization was 2 094 g/g (polyethylene mass based on 1 g catalyst). Additionally, A/w, ww/Mn, crystallinity and branching degree of the obtained polymer were 4.3 x 105, 10.0, 68.34% and 1.028% , respectively.关键词
氯化镁/醇合/四氯化钛/负载型Ziegler - Natta催化剂/乙烯淤浆聚合/聚乙烯Key words
magnesium chloride/ alcohol-adduct/ titanium tetrachloride/ supported Ziegler-Natta catalyst/ ethylene slurry polymerization/ polyethylene分类
化学化工引用本文复制引用
杨俊凤,范玲婷,李贺,吴志祥,许胜,米普科..MgCl2醇合改性对Ziegler - Natta催化剂活性的影响[J].石油化工,2011,40(8):840-844,5.
