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- [1] Modeling of Slurry Polymerization of Ethylene Using a Soluble Cp2ZrCl2/MAO Catalytic System .2 Ahmadi M,Nekoomanesh M,Jamjah R,Zohuri G,Arabi H. Macromol Theory Simul . 2007
COPOLYMERIZATION OF ETHYLENE AND PROPYLENE CATALYZED BY MAGNESIUM CHLORIDE SUPPORTED VANADIUM/TITANIUM BIMETALLIC ZIEGLER-NATTA CATALYSTS
被引：0
|作者：
姜涛
机构：
[1] College of Material Science and Chemical Engineering,Tianjin University of Science & Technology
[2] Department of Chemistry and Chemical Engineering,Northeast Petroleum University
基金：
中国国家自然科学基金;
关键词：
Ziegler-Natta polymerization;
Vanadium/titanium catalyst;
Ethylene-propylene copolymer;
D O I：
暂无
中图分类号：
O643.36 [催化剂];
学科分类号：
081705 ;
摘要：
Magnesium chloride supported vanadium/titanium bimetallic Ziegler-Natta catalysts with di-i-butyl phthalate as internal donor for copolymerization of ethylene and propylene were prepared.The effects of reaction temperature, ethylene/propylene molar ratio,aluminium/vanadium（Al/V）molar ratio and titanium/vanadium molar ratio on the catalytic activity were investigated.The molecular weight,molecular weight distribution,sequence composition and crystallinity of the products were measured by gel permeation chromatography,;C-NMR and differential scanning calorimetry analysis, respectively.In comparison to the vanadium and titanium catalysts,the bimetallic catalyst showed higher catalytic activity and better copolymerization performance.The obtained ethylene/propylene copolymers have high molecular weight （10;）,broad molecular weight distribution,high propylene content with random or short blocked sequence structures （r;r;=1.919）,low melting temperatures and low crystallinities（X;<20%）.
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页码：475 / 482
页数：8
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