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Production of polyacrylonitrile particles by precipitation polymerization in supercritical carbon dioxide

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Abstract

Polyacrylonitrile particles were produced by precipitation polymerization of acrylonitrile (AN) without any colloidal stabilizer in supercritical carbon dioxide as a polymerization medium at about 30 MPa for 24 h at 65 °C at different initiator concentrations (0.8–45.2 mmol/l) and at different AN concentrations (10–40% w/v). An increase in the initiator concentration led to increases in the conversion and in the degree of coagulation and to a decrease in the molecular weight. At AN concentration of 20% w/v, micron-sized, relatively monodisperse polyacrylonitrile particles with clean and uneven surfaces were produced.

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Acknowledgements

This work was partially supported by Grant-in-Aid for Scientific Research (Grant 12450373) from the Japan Society for the Promotion of Science (JSPS). The authors would like to thank Mr. Hiroyuki Tanaka for his assistance.

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Authors and Affiliations

  1. Graduate School of Science and Technology, Kobe University, 657-8501, Kobe, Japan

    Masayoshi Okubo, Syuji Fujii & Hiroshi Maenaka

  2. Department of Chemical Science and Engineering, Faculty of Engineering, Kobe University, 657-8501, Kobe, Japan

    Hideto Minami

Authors
  1. Masayoshi Okubo
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  2. Syuji Fujii
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  3. Hiroshi Maenaka
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  4. Hideto Minami
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Corresponding author

Correspondence to Masayoshi Okubo.

Additional information

Part CCXLIV of the series "Studies on Suspension and Emulsion".

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Okubo, M., Fujii, S., Maenaka, H. et al. Production of polyacrylonitrile particles by precipitation polymerization in supercritical carbon dioxide. Colloid Polym Sci 281, 964–972 (2003). https://doi.org/10.1007/s00396-003-0864-7

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  • DOI: https://doi.org/10.1007/s00396-003-0864-7

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