Mechanical Properties of Nano/Micro-Silica Particles Bidispersed Epoxy Composites
Mechanical properties of nano/micro-silica particles bidispersed epoxy composites were investigated based on experimental results. The composite specimens varied with different compositions of nano and micro-silica particles (240 nm and 1.56$m) were prepared with the constant volume fraction, 0.30. The thermo-viscoelastic properties for the composites and the neat epoxy measured in the temperature ranges from 123 K to 523 K and compared to theoretical results according to Lewis and Nielsen’s law with the maximum particle packing given by Ouchiyama and Tanaka’s model. In addition, fragility derived from the thermo-viscoelasticity measurements was used to characterize the strength and fracture toughness of the composites. From results, we found that the thermo-viscoelasticity of the composite was dependent on nano and micro-particles packing, and its strength and fracture toughness were effectively evaluated by fragility.
S.W. Nam, Y.W. Chang, S.B. Lee and N.J. Kim
S. C. Kwon et al., "Mechanical Properties of Nano/Micro-Silica Particles Bidispersed Epoxy Composites ", Key Engineering Materials, Vols. 345-346, pp. 1507-1510, 2007