Journal of Industrial and Engineering Chemistry

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Microencapsulation of imidazole curing agent for epoxy resin

  • Ham, Young-Rok (Department of Chemistry, Chungbuk National University) ;
  • Lee, Dong-Ho (Department of Chemistry, Chungbuk National University) ;
  • Kim, Sun-Hee (Department of Chemistry, Chungbuk National University) ;
  • Shin, Young-Jae (Department of Electrical and Computer Engineering, Texas A&M University) ;
  • Yang, Min-Hee (Department of Chemistry, Chungbuk National University) ;
  • Shin, Jae-Sup (Department of Chemistry, Chungbuk National University)
  • Received : 2010.01.25
  • Accepted : 2010.04.06
  • Published : 2010.09.25
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Abstract

An epoxy resin-imidazole system was used to form the adhesives for the anisotropic conducting film (ACF), and a latent curing system was necessary for the ACF. In this study, 2-phenylimidazole (2PhI) was encapsulated for the latent curing system. Polycaprolactone (PCL) was used as the wall material, and the solvent evaporation method was used to form the microcapsule. The effects of the ratio of 2PhI and PCL, and the effects of themolecular weight of PCL were investigated during the microcapsule formation. The amount of 2PhI in themicrocapsule was measured using TGA. The permeability of the microcapsuleswas measured in ethanol, and the shelf life of the microcapsules was also studied for the epoxy resin. The curing behavior was examined using DSC. In the curing reaction of the epoxy resin, the microcapsule of 2PhI exhibited a delayed kinetic behavior compared to pure 2PhI. This microcapsule of 2PhI exhibited a long shelf life, and the curing did not occur in this microcapsule-epoxy resin system at $20^{\circ}C$ for more than 30 days.

Keywords

Acknowledgement

Supported by : Ministry of Knowledge Economy, Republic of Korea

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