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Formation of monodisperse poly(1-methacryloxybenzotriazole) particles by radiation-induced dispersion polymerization

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Abstract

Radiation-induced dispersion polymerization of 1-methacryloxybenzotriazole (MABt) in ethyl propionate starts as homogeneous mixture and the resulting polymer precipitates as spherical particles. Formation, size, and shape of polymer particles are strongly dependent on the initial monomer concentration. Three regions can be distinguished: formation of deformed particles at concentrations of ≦15 w/v-% MABt; formation of spherical particles at concentrations from 18 to 35 w/v-% MABt; no precipitation of polymer at concentrations of ≧ 40 w/v-% MABt. The spherical particles at 20 w/v-% MABt had a diameter of 0.54 ± 0.31 μm for 3 kGy irradiation and 2.93±0.68 μm for 30 kGy. The number distribution of the microspheres shows that the spherical particles with small sizes formed at low irradiation dose (low conversion) disappears with increasing irradiation dose because of multi-coating by newly produced polymer.

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Author notes

  1. M. Yoshida

    Present address: Department of Development, Takasaki Radiation Chemistry Research Establishment, Japan Atomic Energy Research Institute, Takasaki, Gunma, Japan

Authors and Affiliations

  1. Department of Development, Takasaki Radiation Chemistry Research Establishment, Japan Atomic Energy Research Institute, Takasaki, Gunma, Japan

    T. Yokota, M. Asano & M. Kumakura

  2. Kokusan Chemical Works Ltd., 2566 Ohwa, Meiwa-mura, Ohra-gun, Gunma, Japan

    T. Yokota

Authors
  1. M. Yoshida
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  2. T. Yokota
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  3. M. Asano
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  4. M. Kumakura
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Yoshida, M., Yokota, T., Asano, M. et al. Formation of monodisperse poly(1-methacryloxybenzotriazole) particles by radiation-induced dispersion polymerization. Colloid & Polymer Sci 267, 986–991 (1989). https://doi.org/10.1007/BF01410159

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  • DOI: https://doi.org/10.1007/BF01410159

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