한국항공우주학회지 (Journal of the Korean Society for Aeronautical & Space Sciences)

  • 제44권9호
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  • Pages.769-774
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  • 2016
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  • 1225-1348(pISSN)
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  • 2287-6871(eISSN)
한국항공우주학회 (The Korean Society for Aeronautical and Space Sciences)
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에폭시 폴리머의 물성에 미치는 태양광 복사 노화의 영향

Effect of Solar Radiation Aging on the Properties of Epoxy Polymers

  • Lee, Dong-Geon (Department of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Lee, Sang-Bong (Department of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Kim, Myung-June (Department of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Park, Jung-Sun (Department of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Lee, Soo-Yong (Department of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Kang, Tae-Yeob (Defence Systems Test Center, Agency for Defence Development)
  • 투고 : 2016.04.18
  • 심사 : 2016.08.20
  • 발행 : 2016.09.01
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초록

장기간 태양광 복사환경에 노출되는 폴리머는 성능의 신뢰성을 확보하기 위해 장기간 환경시험을 필요로 한다. 본 논문에서는 MIL-STD-810을 따라 설계된 태양광 복사 시험기를 이용하여, 7, 14, 28, 56, 그리고 84 주기 동안 태양광 노화 시험을 하였다. 노화 시험 후에 RGB 값을 측정하고 CIE 1976 색공간을 이용하여, 각각의 RGB 감소율과 총 색 변화량을 계산하였다. 또한 만능재료시험기를 이용하여, ASTM-D638 시험 규격을 따라, 기계적 물성이 측정되었다. 결과적으로 태양광 노화 주기가 길어질수록, 총 색 변화량이 증가하였으며, 인장 강도, 연신율이 감소하였으나 탄성계수와 포아송 비는 변화가 적었다.

Epoxy polymer exposed to solar radiation on long-term is required to a long-term environmental test in order to ensure the reliability of operation performance. In this paper, the solar aging experiment is performed for 7, 14, 28, 56, and 84 cycles, using solar simulator designed according to MIL-STD-810. After the aging experiment, measuring RGB values and using the CIE1976 color space, each RGB decreasing rates and total color shift are calculated. In addition, using a universal testing machine, mechnical properties according to ASTM-D638 are measured. As a result, by increasing solar aging period, total color shift is increased, and the tensile strength and elongation are decreased, but the elastic modulus and the poisson's ratio are slightly changed.

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참고문헌

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