Chemo-mechanical Analysis of Bifunctional Linear DGEBA/Linear Amine(EDA, HMDA) Resin Casting Systems

DGEBA/선형 아민(EDA, HMDA) 경화제의 주쇄 탄소숫자와 물성과의 관계에 대한 연구

  • Myung, In-Ho (Department of Chemical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Chung, In-Jae (Department of Chemical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Lee, Jae-Rock (Advanced Materials Division, Korea Research Institute of Chemical Technology)
  • 명인호 (한국과학기술원 화학공학과) ;
  • 정인재 (한국과학기술원 화학공학과) ;
  • 이재락 (화학연구소 화학소재연구단)
  • Received : 1999.06.26
  • Accepted : 1999.09.20
  • Published : 1999.11.10

Abstract

To determine the effect of chemical structure of linear amine curing agents on thermal and mechanical properties, standard epoxy resin DGEBA was cured with ethylene diamine(EDA) and hexamethylene diamine(HMDA) in a stoichiometrically equivalent ratio. From this work, the effect of linear amine curing agents on the thermal and mechanical properties is significantly influenced by the chemical structure or chain length of curing agents. In contrast, the results show that the DGEBA/EDA system having the two carbons had higher values in the thermal stability, maximum conversion of epoxide, density, glass transition temperature, tensile modulus, flexural strength, and flexural modulus than the DGEBA/HMDA system having the six carbons, whereas the DGEBA/EDA cure system had relatively low values in the shrinkage(%), thermal expansion coefficient, tensile strength, and had similar values in the maximum exothermic temperature, and conversion of epoxide compared to the DGEBA/HMDA cure system. This findings indicate that packing ability in the HMDA structure affects the thermal and mechanical properties.

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