Polymerization of Methyl Methacrylate by the Bis(benzoylacetonato)Copper(II)-1,10-Phenanthroline System
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概要
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The addition of 1,10-phenanthroline accelerates the polymerization of methyl methacrylate by a β-diketonato chelate of Cu(II), Mn(II), Mn(III), Co(II), Co(III), and Fe(III), but has no effect on the chelate of Ni(II). The effect of 1,10-phenanthroline, which is composed of two pyridine units, is much greater than that of pyridine. The polymerization rate of methyl methacrylate by the bis(benzoylacetonato)Cu(II)-1,10-phenanthroline system may be represented as follows:<BR><I>R</I><SUB>p</SUB>∝ [MMA]{[Cu(II)][1,10-phenanthroline]}<SUP>1⁄2</SUP><BR>The initiation reaction is assumed to be by a ligand-exchange reaction of bis(benzoylacetonato)Cu(II) with 1,10-phenanthroline, where a benzoylacetonyl ligand is displaced by 1,10-phenanthroline and Cu(II) is simultaneously reduced to Cu(I).
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