| Abstract |
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Self healing property is the ability of a material to be able to heal damages automatically and autonomously. It has wide range of application from paint coating, anti-corrosion coating, space-shuttle material, construction (concrete), automotive, etc. Microcapsules containing reactive compound for use in self healing polymers are successfully fabricated via interfacial polymerization of polyurethane (PU). The possibility of glycerol as polyol monomer for polyurethane microcapsule shell in the preparation of PU prepolymer was studied. In this research, we also studied encapsulated self healing agent using IPDI, stannous octoate, dibutyl tin dylaurate. FTIR analysis showed that obtained polyurethane prepolymer still have unreacted isocyanate group necessary for interfacial polymerization of polyurethane. The morphology of polyurethane microcapsules containing IPDI was observed by scanning electron microscopy and shows spherical microcapsule with wrinkled surface but no agglomeration was found. The morphology of polyurethane microcapsules containing stannous octoate was also in spherical form but have a tendency of agglomerating and so were microcapsules containing dibutyl tin dilaurate. The average microcapsule size was 12.33; 28.59; and 25.65 µm for microcapsule containing IPDI, stannous octoate, and dibutyltin dilaurate respectively. The smallest average particles size (12.33 µm) was observed in microcapsules containing IPDI with narrow particle size distribution so the particles were more homogenous than the others. |
