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One‐Pot Preparation of Core–Shell, Organic–Inorganic, Hybrid Latexes by In Situ Nanoparticle Precipitation in Pickering Emulsion Polymerization
Author(s) -
Pakdel Amirsaeid,
Pourmahdian Saeed,
Eslami Hormoz
Publication year - 2012
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201200249
Subject(s) - pickering emulsion , ammonium persulfate , emulsion polymerization , polymerization , precipitation polymerization , polymer chemistry , chemical engineering , monomer , nanoparticle , materials science , polymer , ammonium bromide , emulsion , methyl methacrylate , bromide , chemistry , pulmonary surfactant , radical polymerization , organic chemistry , engineering
Abstract A one‐pot emulsion polymerization process to produce silica nanoparticles fixed on polymer particles is presented. Simultaneous nanoparticle formation/monomer emulsification and later polymerization of monomers prevent the agglomeration of silica particles and result in hybrid organic–inorganic, core–shell latexes. The emulsion polymerization of methyl methacrylate is performed using nascent silica nanoparticles, cetyltrimethylammonium bromide, and ammonium persulfate as Pickering surfactant, cosurfactant, and initiator, respectively. The effects of parameters like temperature, initiator type and concentration, and cosurfactant and silica precursor amounts on the polymerization, coagulation percentage, and morphology of hybrid particles are determined using SEM and TEM.