Use of silica particles for the formation of organic-inorganic particles by surfactant-free emulsion polymerization

Abstract : Polystyrene/silica (PS/SiO2) and poly(styrene-co-methyl methacrylate)/SiO2 composite latex particles were prepared by surfactant-free emulsion polymerization in the presence of a poly(ethylene glycol) monomethylether methacrylate (PEGMA) macromonomer. The resulting composite particles were stabilized by the negatively charged silica particles that adhered to the surface of the latex particles. Different process parameters were investigated in order to optimize the latex stability and maximize the reaction rate. Mixing in such a surfactant-free process is of major importance and is mainly determined by the type of impeller used during the emulsification. The concentrations of PEGMA and silica particles were also optimized in order to improve the interaction between the organic and inorganic phases and ensure a good latex stability. The presence of silica particles on the polymer particle surface was found to affect radical absorption and decrease therefore the reaction rate.
Type de document :
Article dans une revue
Langmuir, American Chemical Society, 2009, 25 (17), pp.10121-10133. 〈10.1021/la900895z〉
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https://hal.archives-ouvertes.fr/hal-00533227
Contributeur : Nida Sheibat-Othman <>
Soumis le : vendredi 5 novembre 2010 - 15:08:16
Dernière modification le : jeudi 14 février 2019 - 13:54:03

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Nida Sheibat-Othman, Elodie Bourgeat-Lami. Use of silica particles for the formation of organic-inorganic particles by surfactant-free emulsion polymerization. Langmuir, American Chemical Society, 2009, 25 (17), pp.10121-10133. 〈10.1021/la900895z〉. 〈hal-00533227〉

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