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Dispersion polymerization of methyl methacrylate in supercritical carbon dioxide using a silicone‐containing fluoroacrylate stabilizer
Author(s) -
Deniz Sennur,
Baran Nil,
Akgün Mesut,
Uzun I Nimet,
Dinçer Salih
Publication year - 2005
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1898
Subject(s) - dispersion polymerization , methyl methacrylate , supercritical carbon dioxide , materials science , polymer chemistry , butyl acrylate , copolymer , acrylate , polymerization , silicone , methacrylate , methyl acrylate , particle size , stabilizer (aeronautics) , dispersion (optics) , chemical engineering , polymer , supercritical fluid , composite material , chemistry , organic chemistry , mechanical engineering , physics , engineering , optics
Free radical dispersion polymerization of methyl methacrylate (MMA) was carried out in supercritical carbon dioxide (scCO 2 ) using poly{(heptadecafluorodecyl acrylate)‐ co ‐3‐[tris(trimethylsilyloxy)silyl]propyl methacrylate} (p(HDFDA‐ co ‐SiMA)) as stabilizer. Dry, fine powdered spherical poly(methyl methacrylate) (pMMA) particles with well‐defined sizes were produced. The resulting high yield of spherical and relatively uniform micron‐size pMMA particles was formed utilizing various amounts of p(HDFDA‐ co ‐SiMA) random copolymer. The particle diameter was shown to be dependent on the weight percent of the stabilizer added to the system. The effects of varying the concentration of stabilizer (1–7 wt%), reaction time (4–12 h) and pressure (15–35 MPa) upon the polymerization yield, molar mass and morphology of pMMA were investigated. Copyright © 2005 Society of Chemical Industry