Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Studies on Cure Kinetics and Thermal Stability of Epoxy/Nylon 6 Blend

에폭시/나일론6 블랜드의 경화 동력학 및 열안정성에 관한 연구

  • Kim, Dong-Kyu (R&D Division, Korea Institute of Carbon Convergence Technology) ;
  • Kim, Kwan-Woo (R&D Division, Korea Institute of Carbon Convergence Technology) ;
  • Han, Woong (R&D Division, Korea Institute of Carbon Convergence Technology) ;
  • Kwac, Lee-Ku (Department of Carbon Fusion Engineering, Jeonju University) ;
  • Kim, Byung-Joo (R&D Division, Korea Institute of Carbon Convergence Technology)
  • 김동규 (한국탄소융합기술원 연구개발본부) ;
  • 김관우 (한국탄소융합기술원 연구개발본부) ;
  • 한웅 (한국탄소융합기술원 연구개발본부) ;
  • 곽이구 (전주대학교 탄소융합공학과) ;
  • 김병주 (한국탄소융합기술원 연구개발본부)
  • Received : 2015.02.04
  • Accepted : 2015.08.25
  • Published : 2015.10.10
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Abstract

In this work, effects of the blend composition composed of 0, 10, 20, 30 and 40 wt% of nylon 6 to epoxy (diglycidylether of bisphenol-A, DGEBA) resin were investigated in terms of cure kinetics and thermal stability by differential scanning calorimeter (DSC) and thermogravimetric analysis (TGA). As the content of the nylon 6 increased, the maximum exothermic temperature ($T_{max}$) and the value of cure activation energy ($E_a$) decreased. The maximum exothermic temperature of the blending samples decreased with increasing in nylon 6 content, resulting in the decrease in curing activation energy of them due to the rapid curing reaction with epoxy resin in this system. From TGA analysis results of the DGEBA/nylon 6, the thermal stability based on the thermal stability index ($A^*{\cdot}K^*$) and integral procedure decomposition temperature (IPDT) increased with increase in the nylon 6 content. This was because of the combination of DGEBA and nylon 6 having good heat resistance, resulting in improving thermal stability of the DGEBA/nylon 6.

본 연구에서는 epoxy (Diglycidylether of bisphenol-A, DGEBA)에 대한 nylon 6의 혼합비가 각각 0, 10, 20, 30, 40 wt%로 블랜딩한 혼합 수지를 시차 주사 열량계(DSC)와 열 중량 분석(TGA)을 사용하여 경화 동력학 및 열안정성에 관하여 연구하였다. 실험 결과, nylon 6의 함량이 증가함에 따라 최대 발열 온도($T_{max}$)가 낮아지며, 경화 활성화 에너지($E_a$) 값은 감소하였다. 이는, nylon 6의 함량이 증가함에 따라 DGEBA와 결합이 빠르게 이루어져 최대 발열 온도에 영향을 미친다고 판단된다. DGEBA/nylon 6의 TGA 분석 결과 nylon 6의 함량이 증가할수록 열안정지수($A^*{\cdot}K^*$) 및 적분 열분해 진행 온도(IPDT)에 입각한 열안정성이 증가하였다. 이러한 결과는 내열성이 우수한 nylon 6가 DGEBA와 결합하여 DGEBA/nylon 6 내부에 유입되는 열을 흡수하고, 열전달 및 확산을 제어하여 열안정성 인자들의 값이 증가되는 것으로 판단된다.

Keywords

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