화학공학소재연구정보센터
Journal of Supercritical Fluids, Vol.39, No.3, 409-415, 2007
Dispersion polymerization of MMA in supercritical CO2 in the presence of poly (poly(ethylene glycol) methacrylate-co-1H,1H,2H,2H-perfluorooctylmethacrylate)
Various random copolymers of poly(poly(ethylene glycol) methacrylate-co-1H, 1H,2H, 2H-perfluorooctylmethacrylate) (p(PEGMA-co-FOMA)) with different poly(ethylene glycol) (PEG) chain length (M-n = 300,475, and 1100) and different FOMA content have been synthesized in supercritical carbon dioxide (scCO(2)) via free-radical polymerization. The copolymers containing above 50wt% FOMA could be used as a stabilizer for the polymerization of methyl methacrylate (MMA) in scCO(2). For PEGMA (300) and PEGMA (475) copolymers, the copolymeric stabilizer with 67-69 xvt% FOMA content was shown to be optimal to produce rnicrometer-size spherical PMMA powder. The size of pendant PEG group and the composition of copolymer as well as the concentration of MMA affected on the size of PMMA particles and the stability of PMMA latexes in CO2. (C) 2006 Elsevier B.V. All rights reserved.