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- W1506557757 abstract "Abstract The homopolymerization of propene catalyzed by the C s -symmetric ansa -metallocenes Ph 2 C (2,7 - tert Bu 2 Flu )( Cp ) MCl 2 / MAO (M=Zr,Hf) was investigated in series of experiments varifying the polymerization temperature in a range from 0 to 60 °C. The results of the obtained polymers are compared with regard to the chosen transition metal (Zr, Hf). 13 C NMR analysis of the polymers showed a significant higher stereoselectivity for the polymers synthesized with M = Zr. Stereoselectivities are sensitive to the monomer concentration, showing decreasing syndiotacticities with decreasing propene concentration due to increasing amount of skipped insertion which is demonstrated for the zirconium catalyst." @default.
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- W1506557757 date "2002-10-01" @default.
- W1506557757 modified "2023-10-17" @default.
- W1506557757 title "Highly syndiotactic polypropene with Cs-symmetric metallocene/MAO catalysts" @default.
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- W1506557757 doi "https://doi.org/10.1016/s1566-7367(02)00176-0" @default.
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