Two series of toughened epoxy resin systems, which are models of matrix resins for use in carbon fibre reinforced plastics, were prepared. Evaluations of the cured epoxy resins, measuring fracture toughness, impact properties, tensile properties and dynamic mechanical properties were conducted. The correlations between these properties and the apparent concentration of network chains in the resins, v, were investigated and the fracture surfaces were examined with a scanning electron microscope. The superior toughness of these resin systems was obtained without considerable loss in modulus. Unified maximum peak was observed in the plots of Izod impact strength, where the v value of the cured resins was increased.
Посилання на статтю:
Fracture behaviour of toughened epoxy resins cured with N.N'-dimethylethylenediamine / Shinkichi Murakami, Osamu Watanabe and Hiroshi Inoue // Polymer. – 1992. – Vol 33. – P. 572-576.