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Synthesis and Hydrolysis-Resistance Characterization of Waterborne Polyurethane

Waterborne Polyurethane의 합성 및 내가수분해 특성 연구

  • 정부영 (한국신발.피혁연구소 고분자표면연구팀) ;
  • 천정미 (한국신발.피혁연구소 고분자표면연구팀) ;
  • 천제환 (한국신발.피혁연구소 고분자표면연구팀)
  • Received : 2012.08.02
  • Accepted : 2012.09.03
  • Published : 2012.08.31

Abstract

In this study, waterborne polyurethane was prepared from polyester polyol, $H_{12}MDI$, DMPA and sulfopropylated polypropyleneglycol-${\alpha}$,${\omega}$-diamine (SP). The $T_g$ of waterborne polyurethane was increased as the SP content increased, while it was decreased at the NCO/OH ratio of 1.8. Also the hydrolysis-resistance and tensile strength were increased as the SP content increased. The tensile strength decrement of WPU-SP was 2~5% with the exception of WPU-SP-1.

본 연구에서는 수분산 폴리우레탄의 내가수분해성을 개선하기 위하여 polyester polyol, $H_{12}MDI$, DMPA 및 sulfopropylated polypropyleneglycol-${\alpha}$,${\omega}$-diamine (SP)을 사용하여 수분산 폴리우레탄을 합성하였다. 유리전이온도는 SP 함량의 증가에 따라 증가하다가 NCO/OH 비가 1.8에서는 감소하였다. 또한 SP의 함량이 증가함에 따라 인장강도와 내가수분해성은 증가하는 경향을 나타내었으며, SP로 사슬연장한 WPU-SP에서 인장강도 감소율은 약 WPU-SP-1을 제외한 나머지에서 약 2~5%정도로 내가수분해성이 향상되었다.

Keywords

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