Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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Interfacial and Mechanical Properties of Glass Fiber Reinforced Epoxy Composites with Different Crosslinking Density after Saline Water Aging

기지재의 가교밀도에 따른 유리섬유 복합재료의 염수노화 후 계면 및 기계적 물성

  • Shin, Pyeong-Su (Department of Materials Engineering and Convergence Technology, Center for Creative Human Resource & Convergence Materials, Research Institute for Green Energy Convergence Technology,Gyeongsang National University) ;
  • Kim, Jong-Hyun (Department of Materials Engineering and Convergence Technology, Center for Creative Human Resource & Convergence Materials, Research Institute for Green Energy Convergence Technology,Gyeongsang National University) ;
  • Baek, Yeong-Min (Department of Materials Engineering and Convergence Technology, Center for Creative Human Resource & Convergence Materials, Research Institute for Green Energy Convergence Technology,Gyeongsang National University) ;
  • Park, Ha-Seung (Department of Materials Engineering and Convergence Technology, Center for Creative Human Resource & Convergence Materials, Research Institute for Green Energy Convergence Technology,Gyeongsang National University) ;
  • Kwon, Dong-Jun (Department of Materials Engineering and Convergence Technology, Center for Creative Human Resource & Convergence Materials, Research Institute for Green Energy Convergence Technology,Gyeongsang National University) ;
  • Park, Joung-Man (Department of Materials Engineering and Convergence Technology, Research Institute for Green Energy Convergence Technology, Gyeongsang National University)
  • Received : 2018.07.16
  • Accepted : 2018.09.27
  • Published : 2018.10.31
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Abstract

Condition and properties of composites with different chemical structure of epoxy matrix were observed after saline solution treatment. Epoxy was used as matrix and the flexibility was controlled by using 2 typed-epoxies and 3 types hardeners (amine, acid anhydride and amide). Saline water treatment was conducted with 6 wt% NaCl solution at $60^{\circ}C$ for 0, 15, and 30 days. Cross section was observed and interfacial and mechanical and properties was evaluated. Amine type exhibited the highest crosslinking density and mechanical and interfacial properties whereas water absorbance was lowest. It is because that the water molecules can be hardly penetrate into the epoxy matrix or the interface between epoxy and glass fiber and it leads to saline water resistance of composites.

복합재료 기지재의 화학적 조성을 다르게 했을 때 염수처리 후 복합재료의 상태 및 물성을 파악하였다. 기지재는 2가지 종류의 에폭시 기지재와 3가지 종류의 경화제(아민계, 산 무수물계, 그리고 아마이드계) 이용하여 기지재의 유연성을 조절하였다. 각 복합재료에 염수 가속화 실험을 위해 염화나트륨 6 wt% 조건에 $60^{\circ}C$ 가하여 0, 15, 30일 처리하였다. 처리 후에 복합재료의 단면적을 관찰하였고, 기계 및 계면 평가를 실시하였다. 아민계를 이용한 복합재료의 가교밀도, 기계 및 계면 물성이 가장 좋은데 반해, 수분흡수율은 가장 작은 것을 확인하였다. 이는 물분자가 유리섬유와 다른 가교밀도의 에폭시 기지재간의 계면으로 침투가 어렵기 때문이다. 이는 복합재료가 염수에 잘 견딜 수 있는 요인으로 작용할 수 있다.

Keywords

References

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