Citation: Kitti Tangjituabun, Sang Yull Kim, Yuichi Hiraoka, Toshiaki Taniike, Minoru Terano Bunjerd Jongsomjit, Piyasan Praserthdam. POISONING OF ACTIVE SITES ON ZIEGLER-NATTA CATALYST FOR PROPYLENE POLYMERIZATION[J]. Chinese Journal of Polymer Science, ;2008, 26(5): 547-552. shu

POISONING OF ACTIVE SITES ON ZIEGLER-NATTA CATALYST FOR PROPYLENE POLYMERIZATION

Received Date: 20 February 2008
Revised Date: 26 March 2008

The effects of poisoning materials on catalytic activity and isospecificity of the supported Ziegler-Natta catalyst were investigated. A minor amount of simple structure of Lewis base, i.e., methanol, acetone, ethyl acetate, was introduced into the catalyst slurry for partial poisoning catalytic active centers. It was found that the variations in deactivation power were in the order of methanol acetone ethyl acetate. The kinetic investigation via stopped-flow polymerization showed that poisoning compounds caused a decrease in activity through the reduction of the number of active sites whereas no effect on the degree of isotacticity was observed.
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