EPOXY/TITANATE MODIFIED NANOSILICA COMPOSITES: MORPHOLOGY, MECHANICAL PROPERTIES AND FRACTURE TOUGHNESS

Ho Ngoc Minh

Abstract


In this paper, the effect  of modified nanosilica as a reinforcement agent on the performance of epoxy resin using tetrabutyl titanate (TBuT) hardener were investigated. Morphology of the epoxy/modified silica composites was determined by Scanning Electron Microscopy (SEM) method. Impact strength and flexural strength of the composites were measured by Charpy impact test and three-point bending test mode methods, respectively. Fracture toughness and fracture energy were calculated according to pre-cracked, single edge notched method with specimens in three-point bending geometry and suitable equations. The mechanical properties and fracture toughness of composites were significantly enhanced with loading nanosilica content to 5 wt.%.

 


Keywords


epoxy, modified nanosilica, nanocomposite, tetrabutyl titanate (TBuT) hardener, fracture toughness.

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DOI: https://doi.org/10.15625/2525-2518/56/2A/12641

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Published by Vietnam Academy of Science and Technology