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Citation: ZHANG Cheng-Lin, SHAN Cheng-Ji. Effect of Electronegativity of the Elements in Supporters on the Polymerization Activity of Supported Rare Earth Catalysts[J]. Chinese Journal of Applied Chemistry, ;2001, 18(4): 321-323. shu

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

1.
Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022

Received Date: 20 July 2000
Available Online: 30 November 2000
Fund Project: 中国科学院院长基金资助项目(031596) (031596)

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.
- rare earth supported catalyst,
- Ziegler-Natta catalyst,
- butadiene polymerization,
- catalytical activity
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