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- W4251268247 abstract "Dialkylzinc compounds (ZnR2) with the alkyl groups of different steric hindrance were used as chain transfer agents in ethylene and propylene polymerizations catalyzed by two conventional metallocene catalysts including rac-Et(Ind)2ZrCl2 and rac-Me2Si[2-Me-4-Ph-Ind]2ZrCl2. In general, catalyst activities for ethylene polymerizations are barely affected by chain transfer agents, regardless of the R type; however, there are significant activity reductions in propylene polymerizations when the R in ZnR2 is less hindered, and as R becomes bulkier, catalyst activities are gradually restored. ZnR2 and metallocene catalyst active sites tend to form a reversible and catalytically inactive complex, thus, the geometry congested ZnR2 would reduce complex formation tendency and hence, decrease its negative effect on catalyst activities." @default.
- W4251268247 created "2022-05-12" @default.
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- W4251268247 date "2010-03-31" @default.
- W4251268247 modified "2023-09-28" @default.
- W4251268247 title "Dialkylzinc Compounds as Chain Transfer Agents in Ethylene and Propylene Polymerizations Catalyzed by Metallocene Catalysts" @default.
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- W4251268247 doi "https://doi.org/10.1080/10601321003659721" @default.
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