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- W2049361049 abstract "A new carbon bridged cyclopentadienyl chromium complex of the type [ (C5H4)C(CH3)2 CH2(C5H4N) ]CrCl2 was prepared by treatment of CrCl3•(THF) 3 in THF solution with the lithium salt of ligand with cyclopentadienyl and pyridyl group. The chromium complex was characterized by mass spectra and elemental analysis. Activated by Al(i-Bu) 3, the chromium complex displayed a very high activity for methyl methacrylate (MMA) polymerization. After 18 hours, 85.49 % MMA was converted to polymethyl methacrylate (PMMA) with a viscosity average molecular (Mv) of 328000 at 60 °C at MMA/ Al(i-Bu) 3/chromium complex of 2000:20:1 in MMA bulk. The high conversion of MMA and high molecular weight of PMMA are the cause of the unique stable active site formed by the new chromium complex and cocatalyst." @default.
- W2049361049 created "2016-06-24" @default.
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- W2049361049 date "2011-02-01" @default.
- W2049361049 modified "2023-09-22" @default.
- W2049361049 title "Polymerization of Methyl Methacrylate with a Novel Carbon Bridged Cyclopentadienyl Chromium Complex" @default.
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- W2049361049 doi "https://doi.org/10.4028/www.scientific.net/amr.214.517" @default.
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