Citation: Jie Chen a, b, Biao Chen c, Ying-mei Shao b, Chang-wen Pei d, Zhao-hua Jiang a. SYNDIOSPECIFIC POLYMERIZATION OF STYRENE WITH Ar[O,O/NH]Cp*TiCl ACTIVATED WITH MMAO[J]. Chinese Journal of Polymer Science, ;2009, 27(5): 659-665. shu

SYNDIOSPECIFIC POLYMERIZATION OF STYRENE WITH Ar[O,O/NH]Cp*TiCl ACTIVATED WITH MMAO

Received Date: 2 July 2008
Revised Date: 7 July 2008

A series of titanium complexes Ar[O, E]Cp*TiCl (Cp* = C5Me5, Ar = 1,2-phenylene, E = NH (1a); Ar = 1,2-phenylene, E = O (1b); Ar = 2,2′-diphenylene, E = O (1c); Ar = 2,2′-dinaphthalene, E = O (1d)) has been prepared by the reaction of corresponding phenol derivatives with Cp*TiCl3 in the presence of excessive triethylamine. Under the conditions of low Al/Ti molar ratio (e.g. 500) and high reaction temperatures (≥ 70οC), all the titanium complexes display higher catalytic activities towards the syndiospecific polymerization of styrene, in the presence of modified methylaluminoxane (MMAO) as a cocatalyst, than their mother complex Cp*TiCl3. The catalyst activities and polymer yields as well as polymer properties are considerably affected by the steric and electronical effects of the bidentate ligands.
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