Recent development of catalysts for syndiospecific polymerization of styrene

摘要

Catalysts for syndiospecific polymerization of styrene are exained.Among the transition metal complexes,complexes with titanium and one cyclopentadienyl(Cp) ligand show high catalyst activity.Titanium complexes with different substituent groups on Cp ligand were exained and a good relationship between electron density of titanium and the space for styrene coordination was found.The bulky substituent groups reduce the catalyst activity and electron donative substitution groups increase the catalyst activity.