Citation: . SILICA-SUPPORTED NICKEL AND ZIRCONIUM CATALYSTS FOR BRANCHED POLYETHYLENE*[J]. Chinese Journal of Polymer Science, ;2003, 21(4): 453-457. shu

SILICA-SUPPORTED NICKEL AND ZIRCONIUM CATALYSTS FOR BRANCHED POLYETHYLENE*

Received Date: 5 September 2002
Revised Date: 11 November 2002

8-Aminoquinoline nickel dichloride and bis(cyclopentadienyl)zirconium dichloride (Cp2ZrCl2) were supportedsimultaneously on silica to produce branched polyethylene successfully by combined polymerization. The supportedpolymerization results showed that the molecular weight of polyethylene increased while the molecular weight distributionbecame wider and the molecular chains of oligomers remaning in the final solution became shorter as compared to theoligomers obtained in polymerization processes with pure 8-aminoquinoline nickel dichloride catalysis,as well as the Cp2ZrCl2 and nickel combination system.With decreasing amount of Ni catalyst in the supported catalyst,the molecular chains of oligomers in the resulting solution became shorter,while α-olefin selectivity increased.
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