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A novel lanthanocene catalyst system for the polymerization of methyl methacrylate Me 2 Si(CpSiMe 3 ) 2 NdCl– n ‐BuMgCl
Author(s) -
Sun Junquan,
Pan Zhida,
Yang Shilin
Publication year - 2001
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/1097-4628(20010321)79:12<2245::aid-app1031>3.0.co;2-s
Subject(s) - polymerization , catalysis , methyl methacrylate , polymer chemistry , reagent , solution polymerization , molar mass distribution , toluene , materials science , alkyl , molar ratio , chemistry , polymer , organic chemistry
Me 2 Si(CpSiMe 3 ) 2 NdCl activated by n ‐BuMgCl at low molar ratio (1 : 1.2) was successfully used to polymerize methyl methacrylate (MMA) for the first time. Grignard reagent indicated better co‐catalytic properties than alkyl aluminum. Effects of the catalyst concentration, polymerization time, temperature, and solvents were studied in bulk and solution polymerization respectively. The results showed that this catalyst system was very active for MMA polymerization in toluene at 40°C, producing PMMA with high molecular weight (53.5 × 10 4 ) and high conversion (100%). © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 79: 2245–2250, 2001