【摘 要】
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The effects of poisoning materials on catalytic activity and isospecificity of the supported Ziegler-Natta catalyst were investigated.A minor amount of simple s
【机 构】
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School of Materials Science,Japan Advanced Institute of Science and Technology,Ishikawa 923-1292,Jap
【出 处】
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Chinese Journal of Polymer Science
论文部分内容阅读
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.
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, ie, methanol, acetone, ethyl acetate, was introduced into the catalyst slurry for partial poisoning catalytic active centers. I was found that the variations in deactivation power were in the order of methanol> acetone> ethyl acetate. kinetic investigation via stopped-flow polymerization showed that poisoning compounds caused a decrease in activity through the reduction of the number of active sites. no effect on the degree of isotactic was observed.
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