载体中元素电负性对稀土催化剂聚合活性的影响  

Effect of Electronegativity of the Elements in Supporters on the Polymerization Activity of Supported Rare Earth Catalysts

作　　者：张成林[1] 单成基[1] 

机构地区：[1]中国科学院长春应用化学研究所,长春130022

出　　处：《应用化学》2001年第4期321-323,共3页Chinese Journal of Applied Chemistry

基　　金：中国科学院院长基金资助项目!( 0 3 15 96)

摘　　要：Supported rare earth catalysts were made from Nd(O i Pr) 3 and the chlorides as well as bromides of the elements of ⅠA and ⅡA groups which were used as supporters of the catalyst. In the study on the relationship between the composition of supporters and the polymerization activity of butadiene in the presence of the supported rare earth catalysts, it was found that the electronegativity of ⅠA or ⅡA elements has an obvious effect on the activity of supported catalysts, that is the activity of the supported catalyst increases with the increasing of the electronegativity. This phenomenon is explained in terms of the interaction between the HOMO of the butadiene and the LUMO of the neodymium. This rule also holds in the case when halides of magnesium were used as supporters.Supported rare earth catalysts were made from Nd(O i Pr) 3 and the chlorides as well as bromides of the elements of ⅠA and ⅡA groups which were used as supporters of the catalyst. In the study on the relationship between the composition of supporters and the polymerization activity of butadiene in the presence of the supported rare earth catalysts, it was found that the electronegativity of ⅠA or ⅡA elements has an obvious effect on the activity of supported catalysts, that is the activity of the supported catalyst increases with the increasing of the electronegativity. This phenomenon is explained in terms of the interaction between the HOMO of the butadiene and the LUMO of the neodymium. This rule also holds in the case when halides of magnesium were used as supporters.

关 键 词：载体 稀土催化剂 ZIEGLER-NATTA催化剂 丁二烯 聚合 催化活性 聚丁二烯 元素 电负性 

分 类 号：O632.14[理学—高分子化学] O643.361[理学—化学]