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Microsphere synthesis by emulsion copolymerizations of styrene with poly(methacrylic acid) macromonomers
Author(s) -
Ishizu Koji,
Kim Sunwook,
Ichimura Ayako
Publication year - 2002
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.10709
Subject(s) - macromonomer , comonomer , methacrylic acid , polymer chemistry , styrene , copolymer , materials science , emulsion polymerization , polymer , aqueous solution , poly(methacrylic acid) , solvent , particle size , chemical engineering , chemistry , organic chemistry , composite material , engineering
The polymer microspheres were synthesized by emulsion copolymerizations of styrene with vinyl benzyl terminated poly(methacrylic acid) (PMA) macromonomers in an aqueous ethanol solution. In these copolymerization systems, the macromonomer acted not only as a comonomer but also as a stabilizer. The particle diameters obtained from the water‐soluble initiator system showed smaller values than those obtained from the water‐insoluble initiator system. These polymer microspheres had a very narrow particle‐size distribution. The particle diameters depended strongly on the feed amount and molecular weight of PMA macromonomers, water fraction in the mixed solvent, and pH in the medium. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 900–905, 2002