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Production of anomalous polymer microspheres having uneven surfaces by “stepwise” heterocoagulation technique

  • Polymer Science
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Abstract

Anomalous polymer microspheres having uneven surfaces were produced by “stepwise” heterocoagulation technique of small polymer particles (SPs) onto large polymer particles (LPs).SPs andLPs have surface charges opposite to each other in the emulsion states.SPs were produced by emulsion copolymerization of styrene and methacryloyloxyethyltrimethylammonium chloride, andLPs by emulsion terpolymerization of styrene, butyl acrylate and methacrylic acid, with nonionic emulsifier being used in both cases. Maximum covering ofLP bySPs was obtained under the conditions that both emulsions were blended without the coagulation at pH 3 at room temperature and then left stand to coagulate with each other at 70 °C for 4 h at pH 9.

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Author notes

  1. M. Okubo

    Present address: Department of Industrial Chemistry, Faculty of Engineering Kobe University, Rokko, Nada, Kobe, Japan

Authors and Affiliations

  1. Department of Industrial Chemistry, Faculty of Engineering Kobe University, Rokko, Nada, Kobe, Japan

    K. Ichikawa, M. Tsujihiro & Y. He

Authors
  1. M. Okubo
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  2. K. Ichikawa
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  3. M. Tsujihiro
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  4. Y. He
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Part CXI of the series “Studies on Suspension and Emulsion”.

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Okubo, M., Ichikawa, K., Tsujihiro, M. et al. Production of anomalous polymer microspheres having uneven surfaces by “stepwise” heterocoagulation technique. Colloid & Polymer Sci 268, 791–796 (1990). https://doi.org/10.1007/BF01410956

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  • DOI: https://doi.org/10.1007/BF01410956

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