STUDY OF THE SYNTHESIS OF Cis-l,4-POLYBUTADIENE WITH NEW NICKEL CATALYST SYSTEM
新型镍催化体系合成Cis-1,4聚丁二烯的研究

The catalytic activity of Ni-Al(i-Bu), OR-B and Ni-Al(i-Bu)2 OAr-B system (-OR is -OC8H17, -OC9H19 and -OAr is -O-Ph-CH3, -O-Ph-C8H17) for the polymerization of butadiene in hydrogenated dasoline, the modecular weight of the polymer, and the micros tructure of the polymer have been studied. The result showed that the catalytic activity of the new nickel catalpst system for the polymerization of butadiene is very high when the co-cata-lyst is Al(i-Bu)2OR or Al(i-Bu)2OAr, and that the content of Cis-1,4 unit in polymer prepared is about 96%. Based on the mapnetic susceptibility measurement and OW-VIS spectum of the new nickel catalst systems, it could be seen that the Ni(I) existed mainly in the Al(i-Bu)2OR system, and the Ni(I) and Ni(0) coexisted in the Al(i-Bu)2 OAr system.