Polymerization of Methyl Methacrylate with a Novel Carbon Bridged Cyclopentadienyl Chromium Complex

Abstract:

Article Preview

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.

Info:

Periodical:

Edited by:

Zeng Zhu

Pages:

517-521

DOI:

10.4028/www.scientific.net/AMR.214.517

Citation:

Z. Z. Cheng et al., "Polymerization of Methyl Methacrylate with a Novel Carbon Bridged Cyclopentadienyl Chromium Complex", Advanced Materials Research, Vol. 214, pp. 517-521, 2011

Online since:

February 2011

Export:

Price:

$35.00

In order to see related information, you need to Login.

In order to see related information, you need to Login.