【摘 要】
：
Polyolefin resin is widely used in agriculture,industry,medical,military and daily life.The global consumption is more than 100Mt/a.The polyethylene obtained from chromium based catalyst is more than
【机 构】
：
College of Chemistry and Chemical Engineering,Northeast Petroleum University,Daqing City;Heilongjian
论文部分内容阅读
Polyolefin resin is widely used in agriculture,industry,medical,military and daily life.The global consumption is more than 100Mt/a.The polyethylene obtained from chromium based catalyst is more than 40%of the worlds total.Since 1950s,due to high catalytic activity,simple preparation method,and the versatile polymer resin,the chromium catalyst has been a hotspot in olefin polymerization.
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