Polymerization of MMA catalyzed by different novel mixed ligand lanthanocene{(Cp)(Cl) LnSchiff-base (THF)},(COT) -Ln(methoxyethylindenyl)(THF) /Al (i -Bu)3 systems  

作　　者：尤赛夫.穆罕默德 黄吉玲 冯作锋 钱延龙 孙俊全 潘智达 

机构地区：[1]Laboratory of Organometallic Chemistry,East China University of Science and Technology,Shanghai 200237,China [2]Material and Chemical Engineering College ,Zhejiang University,Hangzhou,Zhejiang 310027, China

出　　处：《Chinese Journal of Chemistry》2000年第5期759-763,共5页中国化学（英文版）

基　　金：Project supported by the National Natural Science Foundation of China;Sino-Pectroleum Company (No. 29734145), the National Natural Science Foundation of China (No. 29871919).

摘　　要：This article deals that the rare earth metal complexes along with Al(i'-Bu),can catalyze the polymerization of methyl-methacrylate (MMA) into high molecular weight poly(MMA) along with narrow molecular weight distributions (MWD).A typical example was mentioned in the case of {Cp(Cl) Sm-Schiff-base(THF)} which expresses maximum (conv.% = 55.46 and Mn=354×103) efficiency along with narrow MWD (Mw/Mn<2) at 60℃.The resulting polymer was partially syndiotactic (>60%).The effect of the catalyst,temperature,catalyst/MMA molar ratio,catalyst/Al( i-Bu)3 molar ratio on the polymerization of MMA at 60℃ were also investigated.This article deals that the rare earth metal complexes along with Al(i'-Bu),can catalyze the polymerization of methyl-methacrylate (MMA) into high molecular weight poly(MMA) along with narrow molecular weight distributions (MWD).A typical example was mentioned in the case of {Cp(Cl) Sm-Schiff-base(THF)} which expresses maximum (conv.% = 55.46 and Mn=354×103) efficiency along with narrow MWD (Mw/Mn<2) at 60℃.The resulting polymer was partially syndiotactic (>60%).The effect of the catalyst,temperature,catalyst/MMA molar ratio,catalyst/Al( i-Bu)3 molar ratio on the polymerization of MMA at 60℃ were also investigated.

关 键 词：MMA POLYMERIZATION novel mked ligand lan-thanocene complexes 

分 类 号：O643.3[理学—物理化学]