Effect of amines on the controlled synthesis of poly(methyl methacrylate) catalyzed by ruthenacarboranes |
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Authors: | I D Grishin I T Chizhevsky D F Grishin |
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Institution: | 1.Research Institute of Chemistry,Lobachevsky State University of Nizhni Novgorod,Nizhni Novgorod,Russia;2.Nesmeyanov Institute of Organoelement Compounds,Russian Academy of Sciences,Moscow,Russia |
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Abstract: | The effects of amines on the activity of ruthenium catalysts in the controlled synthesis of poly(methyl methacrylate) are
reported at 80°C. The introduction of tert-butylamine or triethylamine into the polymerization system raises the polymerization rate by 1–2 orders of magnitude without
reducing the high degree of control over the chain propagation step. The “living” character of methyl methacrylate polymerization
in the presence of ruthenacarboranes and amines is proved by the fact that, as the monomer conversion increases, the molecular
weight of the resulting polymer increases linearly and the polydispersity index decreases. The polymer can serve as a macroinitiator
for postpolymerization and block copolymer synthesis. |
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