Journal of Adhesion and Interface (접착 및 계면)

The Society of Adhesion and Interface, Korea (한국접착및계면학회)
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Synthesis and Curing Behavior of UV-curable Polycarbonate-based Polyurethane Methacrylate : Effect of Polyol Molecular Weight, Contents of Photoinitiator and Monomers on the Flexibility and Properties

자외선 경화형 폴리카보네이트계 폴리우레탄 메타아크릴레이트의 합성과 경화거동 : 폴리올 분자량, 광개시제 및 모노머 함량이 유연성과 물성에 미치는 영향

  • Park, Eun-Suk (Lab. of Adhesion and Bio-Composites, Program in Environmental Materials Science, Research Institute for Agriculture and Life Sciences, Seoul National University) ;
  • Hwang, Hyeon-Deuk (Lab. of Adhesion and Bio-Composites, Program in Environmental Materials Science, Research Institute for Agriculture and Life Sciences, Seoul National University) ;
  • Park, Cho-Hee (Lab. of Adhesion and Bio-Composites, Program in Environmental Materials Science, Research Institute for Agriculture and Life Sciences, Seoul National University) ;
  • Lee, Yong-Hee (Lab. of Adhesion and Bio-Composites, Program in Environmental Materials Science, Research Institute for Agriculture and Life Sciences, Seoul National University) ;
  • Moon, Je-Ik (Lab. of Adhesion and Bio-Composites, Program in Environmental Materials Science, Research Institute for Agriculture and Life Sciences, Seoul National University) ;
  • Kim, Hyun-Joong (Lab. of Adhesion and Bio-Composites, Program in Environmental Materials Science, Research Institute for Agriculture and Life Sciences, Seoul National University)
  • 박은숙 (서울대학교 환경재료과학전공 바이오복합재료 및 접착과학 연구실, 농업생명과학연구원) ;
  • 황현득 (서울대학교 환경재료과학전공 바이오복합재료 및 접착과학 연구실, 농업생명과학연구원) ;
  • 박초희 (서울대학교 환경재료과학전공 바이오복합재료 및 접착과학 연구실, 농업생명과학연구원) ;
  • 이용희 (서울대학교 환경재료과학전공 바이오복합재료 및 접착과학 연구실, 농업생명과학연구원) ;
  • 문제익 (서울대학교 환경재료과학전공 바이오복합재료 및 접착과학 연구실, 농업생명과학연구원) ;
  • 김현중 (서울대학교 환경재료과학전공 바이오복합재료 및 접착과학 연구실, 농업생명과학연구원)
  • Received : 2011.02.17
  • Accepted : 2011.06.01
  • Published : 2011.06.30
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Abstract

UV-curable coatings have been used in various industries due to their advantages such as high mechanical property, good solvent resistance, fast curing process and low volatile organic compounds. However, a lack of flexibility of UV-cured films is a weak point for the pre-coated system of roll-to-roll process. In this study, UV-curable polycarbonate-based methacrylates were synthesized with polycarbonate diol, isophorone diisocyanate and 2-hydroxyethylmethacrylate to improve flexibility of the UC-cured films. The effects of polyol molecular weight, content of photoinitiator and monomers on the UV-curing behavior, flexibility and properties were investigated. The UV-curing behavior was measured by a photo-DSC, the pendulum hardness, tensile strength, viscoelastic properties were also evaluated.

자외선 경화형 도료는 기계적 물성과 내화학성, 내마모성 등이 우수하고, 빠른 경화시간으로 경제성이 우수하며, 휘발성유기용제의 양을 줄일 수 있어 환경친화적이기 때문에 다양한 산업분야에서 널리 사용되고 있다. 이에 반해, 유연성이 떨어지는 도막을 형성하기 때문에 최근 활발히 연구되고 있는 선도장 후성형의 pre-coated metal용 도료로 사용하는 데 문제점을 지니고 있다. 본 연구에서는 polycarbonate diol, isophorone diisocyanate와 2-hydroxyethyl methacrylate를 이용해 polyurethane methacrylate를 합성하여 성형 시 필요한 유연성을 향상시켜 선도장 강판용 도료의 적용 가능성을 살펴보았다. 또한, 폴리올의 분자량, 광개시제의 함량, 모노머의 함량이 경화거동, 유연성, 도막물성에 미치는 영향을 평가하였다. Photo-DSC를 이용하여 광경화 거동을 살펴보았고, 진자경도, 인장강도, 점탄성을 측정하여 경화도막의 유연성 및 도막물성을 평가하였다.

Keywords

References

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