화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.19, No.10, 989-997, October, 2011
DOI10.1007/s13233-011-1014-6  Export Citation
Preparation of Cationic Latent Initiators Containing Imidazole Group and Their Effects on the Properties of DGEBA Epoxy Resin
Eui Soung Jang, Sher Bahadar Khan1, Jongchul Seo2, Kalsoom Akhtar3, Yoon Hee Nam, Kwang Won Seo, and Haksoo Han†
  • Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, 120-749, Korea
  • 1The Center of Excellence for Advanced Materials Research, King Abdul Aziz University, Jeddah, 21589, P. O. Box 80203, Saudi Arabia
  • 2Department of Packaging, Yonsei University, Gangwon, 220-710, Korea
  • 3Division of Nano Sciences and Department of Chemistry, Ewha Womans University, Seoul, 120-750, Korea
E-mail:
The thermal cationic latent initiators, N-benzyl-3-methylimidazolium hexafluoroantimonate(BMH1) and N-butyl-3-methylimidazolium hexafluoroantimonate (BMH2) were synthesized and applied to the thermal cationic polymerization of diglycidyl ether of bisphenol A (DGEBA). The performance of BMH1 and BMH2 was examined by differential scanning calorimetry (DSC), which showed good thermal latent properties and excelled epoxy resin curing behavior. The morphology, thermal, mechanical, and water sorption properties of DGEBA resin cured by 1 wt% of BMH1 and BMH2 were measured by X-ray diffraction (XRD), scaming electron microscopy (SEM), thermogravimetric analysis (TGA), nanoindentation, and thin film diffusion analysis. The cured DGEBA/BMH1 system showed relatively higher thermal stability than the DGEBA/BMH2 system. The diffusion coefficient and water uptake were 14.2×10^(-9) cm2/s and 1.15 wt% for the DGEBA/BMH1 system and 11.5×10^(-9) cm2/s and 1.07 wt% for the DGEBA/BMH2 system, respectively. Therefore, DGEBA/BMH2 showed higher resistance to water sorption than DGEBA/BMH1. On the other hand, hardness and elastic modulus of DGEBA/BMH2 were higher than those of DGEBA/BMH1. This can be attributed to the difference in the end group of initiators as well as the degree of crosslinking in the cured resin network.
Keywords:cationic polymerization;epoxy resin;thermal latent catalysts;thermal properties;mechanical properties and water sorption.
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