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Poly(methyl methacrylate) multihollow particles by water in oil in water emulsion polymerization
Author(s) -
Kim BumSu,
Kim JinWoong,
Suh KyungDo
Publication year - 2000
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/(sici)1097-4628(20000404)76:1<38::aid-app5>3.0.co;2-h
Subject(s) - emulsion polymerization , methyl methacrylate , polymer chemistry , materials science , chemical engineering , acrylate , emulsion , butyl acrylate , polymerization , methacrylate , monomer , vinyl acetate , copolymer , polymer , composite material , engineering
Multihollow‐structured poly(methyl methacrylate) (PMMA) particles were produced employing the water in oil in water (W/O/W) emulsion polymerization technique where sorbitan monooleate was used as a primary surfactant and sodium laurylsulfate and Glucopen, a polypeptide derivative, were used as secondary surfactants. Vinyl acetate was copolymerized to improve the wettability of the particles. The agitation speed and concentration of the urethane acrylate employed as a reactive viscosity enhancer played a crucial role in determining the morphology and average size of the PMMA multihollow particles. In high agitation speed the multihollow particles displayed a small size and narrow size distribution resulting from efficient droplet breakup. Especially when the urethane acrylate was incorporated, PMMA multihollow particles with a smooth and clear surface were achieved. This was believed to be because the urethane acrylate increased the viscosity of the monomer mixture and helped to form the stable W/O/W emulsion droplets that restricted droplet coalescence during polymerization. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 76: 38–44, 2000