• Title/Summary/Keyword: 비가산집합

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Synthesis of Fluorine-Containing Water-Soluble Polyurethane with Environmental Affinity (환경친화적 수용성 불소계 폴리우레탄의 합성)

  • Lim, Hyejin;Park, In Jun;Lee, Soo-Bok;Lee, Yongtaek
    • Clean Technology
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    • v.5 no.2
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    • pp.37-44
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    • 1999
  • The influence of the reactant composition on the surface free energy and on the dispersity in water was investigated by using the fluorine-containing water-soluble polyurethane synthesized with the fluorine-containing diol and hydrophilic diol. The diol donating ionic characteristics was more effective than polyol, and stable emulsion with the diameter of 610~310 nm was obtained in the range of 0.3~0.7 molar ratio of the diol to polyol. According to the increment of fluorine-containing compound up to 10 wt %, the surface free energy of polyurethane was dramatically decreased from 22.3 to 12.6 dyn/cm, and the diameter of water dispersed polyurethane increased from 380 to 860 nm due to the strong interaction between polymer molecules because fluorine segments are arranged on the surface of molecules. The macromonomer with perfluoroalkyl group was more effective in complement of the weak point of water-soluble polyurethane, which is a decrease of hydrophobicity, because of strong hydrophobicity.

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