Abstract
A bimodal rubber-particle distributed epoxy resin was made by simultaneous addition of two kinds of liquid rubbers, CTBN1300X9 and CTBN1300X13. These rubbers were added at a constant total rubber content but with varying weight ratios. The microstructure and fracture behaviour of these rubber-modified epoxy resins have been studied. A strong increase in the fracture resistance was found for the bimodal rubber-particle distributed epoxy resin. The role of the small particle is thought to toughen the shear bands between large particles. The role of large particle is thought to induce a large-scale shear deformation in the crack front. The synergistic effect of these particles gives rise to a strong increase in the toughness of these bimodal rubber-particle distributed epoxy systems.
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Chen, T.K., Jan, Y.H. Fracture mechanism of toughened epoxy resin with bimodal rubber-particle size distribution. J Mater Sci 27, 111–121 (1992). https://doi.org/10.1007/BF02403652
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DOI: https://doi.org/10.1007/BF02403652