Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Effect of polyol on urethane to increase the cavitation resistance

우레탄수지에서 캐비테이션 저항을 높이기 위한 Polyol의 영향

  • Lee, Iksoo (Graduate School of Energy and Environment, Seoul National University of Science and Technology) ;
  • Kim, Nackjoo (Graduate School of Energy and Environment, Seoul National University of Science and Technology) ;
  • Pak, Daewon (Graduate School of Energy and Environment, Seoul National University of Science and Technology)
  • 이익수 (서울과학기술대학교, 에너지환경대학원) ;
  • 김낙주 (서울과학기술대학교, 에너지환경대학원) ;
  • 박대원 (서울과학기술대학교, 에너지환경대학원)
  • Received : 2014.11.03
  • Accepted : 2014.12.16
  • Published : 2014.12.30
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Abstract

In this study, a new paint which is able to resist the cavitation erosion is tried to be developed by using urethane added with polyol such as poly propylene glycol(PPG), poly carbonate diol(PCD), polycaprolactone polyol (PCL-1), and poly caprolactone-tetramethylene gylcolether polyol(PCL-2). The new paint synthesized by adding polyol was characterized with physical properties and resistivity to cavitation erosion. Among polyol, the prepolymer added with PCD showed high hardness and wear resistance. However, due to too high in viscosity, the prepolymer added with PCL-1 was selected as a paint. The paint added with PCL-1 showed high resistivity to cavitation erosion and its surface was monitored by using Scanning Electron Microscope.

본 연구에서는 캐비테이션에 의한 부식에 강한 도료를 개발하기 위하여 고탄성의 우레탄 수지에 내마모 성능을 향상시키기 위한 첨가제로서 Polypropylene glycol(PPG), Polycarbonate diol(PCD), Polycaprolactone polyol(PCL-1), Polycaprolactone-tetramethylene glycolether(PCL-2) 등 4가지 종류의 Polyol을 첨가하여 제조한 도료의 물성과 캐비테이션 저항성을 평가하였다. 합성된 도료의 물성을 비교한 결과 Polyol 중에서는 PCD을 첨가한 경우 경도와 내마모성이 높아 캐비테이션 저항성이 높을 수 있는 물성을 가진 것으로 나타났으나 고점도를 가지고 있어서 도료화에 어려움이 있을 것으로 예상되어 점도가 낮은 도료를 위하여 PCL-1을 적절한 첨가제로 선정하였다. PCL-1이 첨가된 도료의 캐비테이션 저항성을 평가한 결과 저항성이 높은 것으로 나타났고 SEM을 이용하여 표면 분석을 통한 기공의 침식현상을 관찰하였다.

Keywords

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