Abstract
A new type of the half-metallocene catalysts for the syndiospecific polymerization of styrene was prepared by the reaction of various kinds of trialkanolamine with Cp*TiCl 3 in the presence of triethylamine. All seven compounds have a highly thermal stability and they show fairly good activities in the presence of cocatalyst MMAO in styrene polymerization. Especially, highly bulky and electronically deficient 7/MMAO system affords syndiotactic polystyrene with very high molecular weight.
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