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| Volume 3, Issue 03 - 2007 |
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| 1 |
SYNTHESIS OF POLYMER-SILICA COMPOSITE NANOPARTICLES FOR ELECTROPLATED COATINGS |
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| Pages 75-81 |
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| K. KOTTI, O. KAMMONA AND C. KIPARISSIDES1 |
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| 1 Department of Chemical Engineering, Aristotle University of Thessaloniki and Chemical Process Engineering Research Institute, P.O. Box 472, 54124 Thessaloniki, Greece |
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| Received 1 June 2007; accepted 27 July 2007 |
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| Hybrid polystyrene/silica composite nanoparticles were prepared via (i) styrene / 4-vinylpiridine precipitation copolymerization and (ii) styrene / 1-vinylimidazole emulsifier-free emulsion copolymerization, in the presence of an ultrafine aqueous silica sol. The effect of key process parameters, such as solvent type, monomers concentration and volume ratio for precipitation polymerization and reaction temperature and initial monomers molar ratio for emulsifier-free emulsion polymerization on the size, morphology and silica content of the produced composite nanoparticles was investigated. The composite nanoparticles obtained by precipitation polymerization were subsequently codeposited on steel from an acid zinc electroplating bath. |
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