Proceedings of the Korean Society For Composite Materials Conference (한국복합재료학회:학술대회논문집)

The Korean Society for Composite Materials (한국복합재료학회)
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Characterization of Microcapsules for Self-Healing in Polymeric Composites

  • Lee Jong Keun (Department of Polymer Science and Engineering, Kumoh National Institute of Technology) ;
  • Hong Soon Ji (Department of Polymer Science and Engineering, Kumoh National Institute of Technology) ;
  • Liu Xing (Department of Polymer Science and Engineering, Kumoh National Institute of Technology) ;
  • Park Hee Won (School of Mechanical Engineering, Kumoh National Institute of Technology) ;
  • Yoon Sung Ho (School of Mechanical Engineering, Kumoh National Institute of Technology)
  • Published : 2004.04.01
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Abstract

Two different diene monomers [dicyclopentadiene (DCPD) and 5-ethylidene-2-norbomene (ENB)] as self­healing agent for polymeric composites were microencapsuled by in-situ polymerization of urea and formaldehyde. The healing agents were investigated by differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). Exothermic reaction and glass transition temperature from DSC and storage modulus (G') and tan $\delta$ from DMA curves were analyzed for the samples cured for 5 min and 24 h in the presence of different amounts of catalyst. Micorcapsules were successfully formed for both diene monomers. Microcapsules containing the healing agent were manufactured and its thermal properties were characterized by thermo gravimetric analysis (TGA). Optical microscope (OM) and particle size analyzer (PSA) were employed to observe morphology and size distribution of microcapsules, respectively. Comparison of the two self-healing agents and their microcapsules with the two was made in this study.

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