双核单茂钛催化苯乙烯间规聚合反应

Dinuclear Titanocene for Syndiotactic Polystyrene

A new type of dinuclear titanocene was prepared by the reaction of bis(N,N-diethoxyl-aniline)-methane with pentamethylpentadienyl titanium trichloride in the presence of excessive triethylamine.The dinuclear titanocene displays catalytic activities towards the syndiospecific polymerization of styrene in the presence of modified methylaluminoxane(MMAO) as a cocatalyst,and produces higher molecular weight and syndiotacticity polystyrenes having bimodal molecular weight distribution than their mother complex Cp*TiCl3.Also,the study of polymerization behavior of dinuclear titanocene was carried out under the different polymerization temperature and Al/Ti molar ratio.

A new type of dinuclear titanocene was prepared by the reaction of bis（ N, N-diethoxyl-aniline）- methane with pentamethylpentadienyl titanium trichloride in the presence of excessive triethylamine. The dinuclear titanocene displays catalytic activities towards the syndiospecific polymerization of styrene in the presence of modified methylaluminoxane （MMAO） as a coeatalyst, and produces higher molecular weight and syndiotacticity polystyrenes having bimodal molecular weight distribution than their mother complex Cp ＊ TiCl3. Also, the study of polymerization behavior of dinuclear titanocene was carried out under the different polymerization temperature and Al/Ti molar ratio.