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PMMA Encapsulated Silica Particles by Dispersion Polymerization in Supercritical Carbon Dioxide
Author(s) -
Park Eun Ju,
Kim Won Soo,
Hwang Ha Soo,
Park Chan,
Lim Kwon Taek
Publication year - 2007
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200750332
Subject(s) - dispersion polymerization , materials science , supercritical carbon dioxide , supercritical fluid , copolymer , chemical engineering , methacrylic acid , methyl methacrylate , polymerization , dispersion (optics) , polymer chemistry , methacrylate , composite number , radical polymerization , polymer , composite material , organic chemistry , chemistry , physics , optics , engineering
PMMA encapsulated silica particles were synthesized by the dispersion polymerization of MMA in supercritical carbon dioxide (scCO 2 ). Nanosized silica particles pretreated with 3‐(trimethoxysilyl) propyl methacrylate (γ‐MPS) were used as seeds in the polymerization. Polymeric stabilizer, poly(dimethylsiloxane)‐ b ‐poly (methacrylic acid) (PDMS‐ b ‐PMA) copolymer provided sufficient stabilization to the silica/PMMA composite latexes in scCO 2 to produce spherical particles. SEM and TEM analysis revealed that the composite particles have core‐shell type morphology.

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