Abstract
Blend samples were prepared by physical mixing of epoxy resin with varying concentration of liquid polysulfide. The blend samples were cured with aromatic acid anhydride. A comparative study of Fourier transform infrared spectra (FTIR) showed the modification as a result of chemical reaction between epoxide group, curing agent and polysulfide. The tensile strength of cured samples decreased slightly, whereas the elongation at break showed an increasing trend with increase in polysulfide content i.e. up to 50 gm. phr, in the blend samples. Appreciable improvements in impact strength were also observed in the prepared blend systems. The cured resin blend showed two phase morphology where the rubber domains were dispersed in the epoxy matrix.
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