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Effect of monomer and hydrocarbon content and polarity of the medium on the preparation of nonspherical particles via seeded dispersion polymerization in the presence of saturated hydrocarbon droplets

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Abstract

In this work, the preparation of micron-sized polymer particles with nonspherical shapes via seeded dispersion polymerization of 2-ethylhexyl methacrylate (EHMA) with polystyrene (PS) seed particles in the presence of decane droplets and evaporation of decane after the polymerization under various polymerization conditions was discussed. The effect of monomer and decane content and polarity of the medium on the shape of the obtained particles was investigated. The experimental results showed that decreasing the amount of monomer and hydrocarbon volume of PEHMA/hydrocarbon domains, the particles decreased but they grew symmetrically, resulting in symmetric shapes. Furthermore, it was suggested that because of changing the solubility of the oligoradicals and hydrocarbon in the medium, the shape of the particles changed with changing the polarity of the medium. With decreasing the polarity of the medium, solubility of the oligoradicals in the medium increases and bigger polymer domains form on the surface of PS particles which can absorb higher amounts of decane. All of these can contribute to an increase in volume reduction after extraction of PEHMA/decane, resulting in various particle shapes. Further decreasing in polarity of the medium leads to an increase in the solubility of decane in the medium and decreasing the absorbed amount of decane by PS particles and PEHMA domains, resulting in lower volume reduction after evaporation of decane.

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Authors and Affiliations

  1. Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, Tehran, Iran, 15914

    Hormoz Eslami, Soleyman Hosseinzadeh, Younes Saadat & Faramarz Afshar-Taromi

  2. Payame Noor University, Tehran, Iran

    Mehdi Rimaz

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  1. Hormoz Eslami
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  2. Soleyman Hosseinzadeh
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  3. Younes Saadat
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  4. Faramarz Afshar-Taromi
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  5. Mehdi Rimaz
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Correspondence to Soleyman Hosseinzadeh.

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Eslami, H., Hosseinzadeh, S., Saadat, Y. et al. Effect of monomer and hydrocarbon content and polarity of the medium on the preparation of nonspherical particles via seeded dispersion polymerization in the presence of saturated hydrocarbon droplets. Colloid Polym Sci 290, 1463–1469 (2012). https://doi.org/10.1007/s00396-012-2723-x

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  • DOI: https://doi.org/10.1007/s00396-012-2723-x

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