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Citation: Yang Zhi-Hong, Luo He-Kuan, Mao Bing-Quan, Tang Rui-Guo, Yu Ding-Sheng, Wang Gui-Hua. In Situ UVVis Studies on Nickel Catalyst for Ethylene Polymerization[J]. Acta Physico-Chimica Sinica, ;2001, 17(05): 460-464. doi: 10.3866/PKU.WHXB20010517 shu

In Situ UVVis Studies on Nickel Catalyst for Ethylene Polymerization

1.
Beijing Research Institute of Chemical Industry,Beijing　100013;Beijing University of Chemical Technology, Beijing 　100029

Received Date: 5 September 2000
Available Online: 15 May 2001

An apparatus was set up for in situ UVVis determintion of ethylene polymerization under atmospheric pressure. In three different solvents, tetrahydrofuran(THF), chlorobenzene and dimethyl formamide (DMF), and using MAO as cocatalyst, α-iimine/nickel catalytic system was prepared for ethylene polymerization with the UVVis testing system. In THF, active peak at 545 nm and inactive peak at 660 nm were observed. In chlorobenzene, active peak at 520 nm, 570 nm, and inactive peak at 660 nm were also observed. The regularities of growth and disappearence of active peaks were investigated. The structure of active species and solvent effect were discussed.
- α-iimine;Nickel;UV-Vis;Ethylene;Polymerization
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