Elastomers and Composites

  • 제40권3호
  • /
  • Pages.166-173
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  • 2005
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  • 2092-9676(pISSN)
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  • 2288-7725(eISSN)
한국고무학회 (The Rubber Society of Korea)
권호 표지

에폭시 접착제의 내수성, 열적 및 기계적 물성에 관한 연구

A Study on the Water Resistance and Thermo-mechanical Behaviors of Epoxy Adhesives

  • 박수진 (한국화학연구원 화학소재연구부) ;
  • 김종학 (한국화학연구원 신뢰성평가센터) ;
  • 최길영 (한국화학연구원 신뢰성평가센터) ;
  • 주혁종 (충남대학교 고분자공학과) ;
  • 김범용 (한국화학연구원 화학소재연구부)
  • Park, Soo-Jin (Reliability Assessment Center, Korea Research Institute of Chemical Technology) ;
  • Kim, Jong-Hak (Reliability Assessment Center, Korea Research Institute of Chemical Technology) ;
  • Choi, Kil-Yeong (Reliability Assessment Center, Korea Research Institute of Chemical Technology) ;
  • Joo, Hyeok-Jong (Department of Polymer Science and Engineering, Chungnam National University) ;
  • Jin, Fan-Long (Advanced Materials Division, Korea Research Institute of Chemical Technology)
  • 발행 : 2005.09.30
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⟨ 이전 논문 다음 논문 ⟩

초록

본 논문에서는 세가지 종류의 경화제 (D-230, G-5022 및 HN-2200)를 사용하여 열화가 에폭시 접착제의 질량변화 및 흡수량에 미치는 영향을 고찰하였다. 경화된 시편의 열적 및 기계적 특성은 유리전이온도와 전단강도 측정을 통하여 알아보았다. 실험 결과, D-230와 HN-2200를 경화제로 사용하였을 경우 열화 시간이 시스템의 질량 변화에 영향을 주지 않았으며, G-5022를 경화제로 사용하였을 경우 시스템의 질량은 열화 시간에 따라 현저하게 감소하였다. 열화 이전의 DGEBA/G-5022 시편을 제외하고 모든 시편의 흡수량은 시간에 따라 점차 증가하였다. 또한, DGEBA/HN-2200 시스템이 제일 높은 $T_g$ 값을 나타내었으며, 이는 경화된 시스템이 지방족 고리를 함유한 3차원 네트워크 구조를 형성한 것으로 판단된다. 에폭시 수지의 접착강토는 열화 시간에 따라 점차 증가하였으며, 이는 에폭시 수지의 경화도 증가와 보다 발달된 3차원 네트워크 구조의 형성에 기인한다. 또한, 내수 실험 후 열화 전후의 모든 시편의 유리전 이온도와 전단접착강도는 흡수시간에 따라 감소하였다.

Effect of thermal aging on the weight loss and water absorption of epoxy adhesives was investigated in the presence of three types of different hardeners, such as D-230, G-5022, and HN-2200. Thermal and mechanical properties of the cured epoxy resins were also studied througth the glass transition temperature and shear adhesion strength measurements. Weight losses of DGEBA/D-230 and DGEBA/HN- 2200 systems were not varied. However, the weight of DGEBA/G-5022 system was significantly decreased with increasing the thermal aging time. The water absorption of the specimens was increased as the thermal aging time increased except that using G-5022. DEGBA/HN-2200 system showed higher $T_g$ value than those of other systems, due to the formation of the fine three-dimensional network structure containing aliphatic ring. Shear adhesion strength of all systems was increased with increasing the thermal aging tine, which is attributed to increased degree of cure and fine three-dimensional network structure formation. And $T_g$ values and shear adhesion strength of all specimens exposed to water was decreased as the immersion time increased.

키워드

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