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In situ emulsion polymerization and characterization of poly(butyl acrylate-co-methyl methacrylate)/silica nanosystems

Addition of filler in the polymer matrix affects matrix structure and hence affects final material properties. Organic/inorganic nanocomposites due to their attractive mechanical, thermal, optical, electrical and magnetic properties are used for different purpose in electronics, paints and coatings, adhesive industry, medicine, etc. The aim of this work was to synthesis stable emulsions of butyl acrylate (BA) and methyl methacrylate (MMA) copolymer with silica nanofiller (0-10 wt %) using in situ emulsion polymerization. In situ emulsion polymerization is one of the most frequently used approach to synthesise organic/inorganic nanocomposites with core-shell morphology, in which silica is a core and polymer matrix shell. With this procedure good dispersion and distribution of inorganic component in emulsion particles, as well as in the film prepared from emulsion was expected. Characterization of emulsion was direct to determination of silica encapsulation and particle size distribution of emulsion. Mechanical and thermal (DSC and TGA) properties were determinate on samples in the form of film. Results indicate that silica nanofiller has no significant influence on glass transition temperature. However, investigated organic/inorganic nanocomposites with silica nanofiller exhibit enhanced thermal stability and mechanical properties compared to acrylate polymer.

acrylate polymer; silica nanofiller; in situ emulsion polymerization nanocomposites

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