Copolymerization of tetracyclododecene or norbornene with styrene in the presence of Ni(II) complex/MAO catalytic system: First example for transition metal catalyzed copolymerization of tetracyclododecene with styrene

摘要

The first example for transition metal catalyzed copolymerization of tetracycloclodecene (TD) with styrene as well as of norbornene (NB) with styrene was achieved by the use of nickel(II) complex in the presence of MAO. High cyclic olefin contents of these copolymers were showed by H-1 NMR measurements. Their GPC curves are all unimodal and M-w/M-n ratio of both homo- and copolymer samples are rather narrow value. These results show that these homo- and copolymerization take place at a single active site. The cyclic olefin content in these copolymers could be changed by changing the comonomer feed ratio. TD/styrene copolymers showed higher T-g value than that for NB/styrene copolymers, and the T-g value were increases with an increase of TD content. (c) 2008 Wiley Periodicals, Inc.