镍催化剂乙烯聚合原位UV-Vis光谱研究  

In Situ UV- Vis Studies on Nickel Catalyst for Ethylene Polymerization

作　　者：杨志洪[1] 罗河宽[2] 毛炳权[2] 唐瑞国[2] 余鼎声[1] 王桂花[1] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029 [2]北京化工研究院,北京100013

出　　处：《物理化学学报》2001年第5期460-464,共5页Acta Physico-Chimica Sinica

基　　金：国家重点基础研究专项经费资助&&

摘　　要：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- diimine/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.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, alpha -diimine/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.

关 键 词：Α-二亚胺 乙烯 聚合 镍催化剂 催化活性 原位UV-Vis光谱 

分 类 号：O657.3[理学—分析化学]