Synthesis and application of metallocene catalyst with multi-methyl mixed with cyclopentadienyl ligands
A series of cyclopentadienyl ligands were synthesized,and several methyl groups were introduced into one cyclopentadienyl ring to prepare a metallocene catalyst with multi-methyl mixed with cyclopentadienyl ligands.In addition,methylalumoxane was used as a cocatalyst,and the evaluation of olefin polymerization was carried out.The results were compared with the commercial zirconium dichloride.The experimental results show that the catalytic activity of the metallocene catalyst with multi-methyl mixed with cyclopentadienyl ligands is comparable to that of zirconium dichloride,with a maximum value of 7 951 kg/(mol·h).It can catalyze the copolymerization of ethylene and 1-hexene,and the content of 1-hexene in the copolymer can reach 6.8%(x).
multi-methyl mixed with cyclopentadienyl ligandmetallocene catalystolefini polymerization
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