Sa. Mang et al., Controlled polymerization of methyl methacrylate with prophinatocobalt(II)catalysts in supercritical carbon dioxide, ORG LETT, 1(1), 1999, pp. 125-127
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We report the successful controlled polymerization of methyl methacrylate i
n the presence of the catalytic chain transfer agents 5,10,15,20-tetrapheny
lporphinatocobalt(II) and 5,10,15,20-tetra(pentafluorophenyl)porphinatocoba
lt(ll) (CoTFPP) in supercritical carbon dioxide (scCO(2)). Low molecular we
ight polymers with narrow polydispersities have been prepared both at low a
nd high monomer conversion and the chain transfer constant is found to be 1
.3 x 10(3), which is comparable to the value obtained in traditional solven
ts.