Effect of Particle Size on Fracture Toughness of Spherical-Silica Particle Filled Epoxy Composites

Abstract:

We investigated the particle size effects on the fracture toughness of epoxy resin composites reinforced with spherical-silica particles. The silica particles had different mean particle diameters of between 1.56 and 0.24µm and were filled with bisphenol A-type epoxy resin under different mixture ratios of small and large particles and a constant volume fraction for all particles of 0.30. As the content with the added smaller particle increased, the viscosity of each composite before curing remarkably increased. We conducted the single edge notched bending test (SENB) to measure the mode I fracture toughness of each composite. The fracture surface with the small particle content exhibited more rough areas than the surface with larger particles. The fracture toughness increased below the small particle content of 0.8 and saturated above it. Therefore, near the small particle content of 0.8, the composite had a relatively low viscosity and a high fracture toughness.

• Periodical: Key Engineering Materials (Volumes 297-300)
• Pages: 207-212
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.297-300.207
• Online since: November 2005
• Authors: Soon Chul Kwon, Tadaharu Adachi, Wakako Araki, Akihiko Yamaji
• Keywords: Fracture Surface, Fracture Toughness, Spherical-Silica Particle Filled Epoxy Composite

References

[1] S. Ahmed and F.R. Jones: J. Mater. Sci. Vol. 25 (1990), pp.4933-4942.

[2] R.A. Peason and A.F. Yee: J. Mater. Sci. Vol. 26 (1991), pp.3828-3844.

[3] M.A. Phipps, G. Pritchard and A. Torabi: Polym. Com. Vol. 3 (1995), pp.71-77.

[4] R.J. Young, D.L. Maxwell and A.J. Kinloch: J. Mater. Sci. Vol. 21 (1986), pp.380-388.

[5] Y. Nakamura, M. Yamaguchi, M. Okubo and T. Matsumoto: J. Appl. Polym. Sci. Vol. 45 (1992), pp.1281-1289.

[6] Y. Nakamura, M. Yamaguchi, M. Okubo and T. Matsumoto: Polymer Vol. 32 (1991), pp.2976-2979.

[7] A.C. Moloney, H.H. Kausch, T. Kaiser and H.R. Beer: J. Mater. Sci. Vol. 22 (1987), pp.381-393.

[8] A.C. Moloney, H.H. Kausch and H.R. Stieger: J. Mater. Sci. Vol. 18 (1983), pp.208-216.

[9] S.W. Koh, J.K. Kim and Y.W. Mai: Polymer Vol. 34 (1993), pp.3446-3455.

[10] T. Adachi, M. Osaki, A. Araki and A. Yamaji: Proc. JSME M&M Vol. 03 (2003), pp.115-116.

[11] S. Das, V.S.R. Murthy and G.S. Murty: J. Mater. Sci. Vol. 34 (1999), pp.1347-1352.

[12] W.J. Cantwell, A.C. Roulin-Molony and T. Kaiser: J. Mater. Sci. Vol. 23 (1988), pp.1615-1631.