Fracture toughness of epoxy polymer modified with nanosilica particles: Particle size effect

An epoxy resin was modified by the addition of different nanosilica particles. The particles were distributed into epoxy resin with ultrasonic instrument which gave a very well-dispersed phase of nanosilica particles. Tensile test and dynamic mechanical thermal analysis (DMTA) showed that Young’s modulus increased and the glass transition temperature was unchanged. The fracture energy increased to about 620 J/m2 for the epoxy with 3.17 vol.% of...