Strength and fracture toughness of nano and micron-silica particles bidispersed epoxy composites: evaluated by fragility parameter
Source abstract
Abstract
In this study, we discuss the composition effect of 240 nm and 1.56 μm-silica particles on strength and fracture toughness by examining two parameters, fragility and glass transition temperature, that were derived from the thermo-viscoelasticity measurements. Experimental results showed that the composites had a lower fragility with higher strength and fracture toughness as the content of nanoparticles was increased regardless of glass transition temperature. The improvement in mechanical properties from adding nanoparticles was definitely explained by the fragility represented the heterogeneity in polymer matrix, and this was related to the interaction between particles and matrix. The fragility was found to be an effective parameter for evaluating strength and fracture toughness of epoxy composite containing a bidispersion of nano and micron-silica particles.
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Research context
OpenAlex topics: Polymer Nanocomposites and Properties · Epoxy Resin Curing Processes · Polymer crystallization and properties
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