2014 年 39 巻 2 号 p. 125-128
We report the first synthesis of polymer nanoparticles employing the phase inversion temperature (PIT) method using a polymeric surfactant. Oil-in-water nanoemulsions were prepared by the PIT method using amphiphilic comb-like block polymer (polystyrene-b-poly[oligo(ethylene glycol) methyl ether methacrylate], PSt-b-POEGMA) as a polymeric surfactant, and subsequently St droplets were polymerized. PSt-b-POEGMA was synthesized by sequential atom transfer radical polymerization of St and OEGMA. The interfacial property of PSt-b-POEGMA in aqueous media was investigated by surface tension measurement and fluorescence probe technique. Monodisperse PSt nanoparticles with 50 nm in diameter were obtained by a free radical polymerization of St droplets initiated by the water-soluble initiator.