摘要：

The living radical polymerization of methyl methacrylate and styrene was successfully carried out with diethyl 2,3-dicyano-2,3-diphenylsuccinate (DCDPS)/ferric tri(diethyldithiocarbamate) as a novel reverse atom transfer radical polymerization initiation system in which DCDPS was a hexa-substituted ethane-type thermal iniferter, DC was a diethyldithiocarbamate group, and no additional ligands such as nitrogen- or phosphine-based compounds were required. The bulk polymerization of methyl methacrylate was carried out at 95 °C, and that of styrene was carried out at 120 °C. Poly(methyl methacrylate) and polystyrene (PSt) with high molecular weights and quite narrow molecular weight distributions (as low as 1.09 for PSt) were obtained. 1 H NMR spectroscopy revealed the presence of an α-(carbethoxycyanophenyl)methyl group from the initiator and an ω-DC group from the catalyst in the obtained polymers. Various chain-extension reactions under UV light or thermal treatments were successfully conducted to prove the presence and efficient reinitiating of the ω-DC group. 2001 John Wiley & Sons, Inc. J Polym Sci Part A: Polym Chem 39: 3464–3473, 2001

展开