Effect of Pigments on Size Distribution of Colored Polystyrene Particles produced by Suspension Polymerization

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  • SAITO Natsukaze
    Department of Chemical Engineering, Faculty of Engineering, Niigata University
  • HOSOGAI Kazuhiko
    Department of Chemical Engineering, Faculty of Engineering, Niigata University
  • KIMURA Isao
    Department of Chemical Engineering, Faculty of Engineering, Niigata University
  • TANAKA Masato
    Department of Chemical Engineering, Faculty of Engineering, Niigata University

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  • 懸濁重合により生成された着色ポリスチレン粒子の粒径分布に及ぼす顔料の影響
  • ケンダク ジュウゴウ ニ ヨリ セイセイサレタ チャクショク ポリスチレン リ

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Colored polystyrene particles were produced by suspension polymerization. Pigments adopted here were carmine 6 B (Index number 15850), disazo-yellow (Index number 21100), copper phthalocyanine blue (Index number 74160). Pigments were added into styrene monomer before suspension polymerization. The effect of the pigments on the size distribution of colored polymer beads was mainly investigated. Also, the charge distribution, the ζ-potential and the distribution of pigment in the polymer beads were measured.<BR>When disazo-yellow was added to the monomer, the suspension polymerization was not affected. When carmine 6 B was added, however, coalescence between polymer droplets in the course of polymerization was promoted, which resulted in agglomeration. When copper phthalocyanine blue was added, the polymerization was hindered and no polymer particles were produced at its higher concentration.

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