METALLOCENE CATALYSTS AND THEIR SUPPORTS FOR OLEFIN POLYMERIZATION
Metallocene catalysts have attracted attention from both academic and business communities due to the single center catalytic performance in the polymerization of α-olefins,dienes and styrene.In order to further improve the activity and utilization efficiency of catalysts,prevent the occurrence of kettle sticking phenomenon and effectively control the microstructure of catalytic products,metallocene catalysts are usually loaded on the carrier for use.The basic structure and development history of metallocene catalysts were introduced,and the kinds of supports for metallocene catalysts were summarized,including MgCl2,molecular sieves or porous materials,layered materials,polymers,carbon nanotubes and graphite,and silica gel,and self-loading characteristics and properties were summarized.It was pointed out that it was still an important work to search for highly active catalysts and their efficient loading processes in this field in the future.
metallocene catalystsingle center catalysispolyolefinscarrier
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