Synthesis of Fluorine Modified Polyurethane and Surface Modification

불소 변성 폴리우레탄의 합성과 표면 개질

  • Lim, Chul Hwan (Department of Chemical Engineering, Hanyang University) ;
  • Choi, Hee Sung (Department of Chemical Engineering, Hanyang University) ;
  • Noh, Si Tae (Department of Chemical Engineering, Hanyang University)
  • 임철환 (한양대학교 공학대학 화학공학과) ;
  • 최희성 (한양대학교 공학대학 화학공학과) ;
  • 노시태 (한양대학교 공학대학 화학공학과)
  • Received : 1999.06.28
  • Accepted : 1999.08.18
  • Published : 1999.10.10

Abstract

Fluorine modified diisocyanate(FMD) was synthesized from tris(6-isocyanatohexyl)isocyanurate(TIHI) and N-ethyl-N-2-hydroxyethyl-perfluorooctanesulfonamide(HFA). Fluorine modified polyurethane(FMPU) was also synthesized from FMD and poly(tetramethylene) glycol(PTMG). Modified polyurethanes were made by blending FMPU into the polyester type base polyurethane(BPU). Surface and thermal properties of the blended BPU film was measured by contact angle measurement and DSC. As the amounts of FMPU was increased from 0 wt % to 1 wt %, the surface energy was dramatically decreased from 47.82 dyne/cm to 17.64 dyne/cm. But we observed little change of the contact angle with further increase in the amount of the FMPU up to 10 wt %. The data meant that the surface of the blended polyurethanes was hydrophobic due to the surface arrangement of the fluorine containing moiety in FMPU. Phase separation was induced by the incompatibility of FMPU and BPU for the samples having over 5 wt % of FMPU. The thermal analysis data of these samples showed the thermal behavior of the FMPU itself.

Keywords

fluorine modified polyurethane;surface energy;contact angle;hydrophobic

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