Epoxidation of rubber seed oil was carried out using a peroxyacid generated in situ from glacial acetic acid and hydrogen peroxide to produce epoxidized rubber seed oil. The maximum relative conversion to oxirane of 88 % could be obtained at 60 °C after a reaction time of 7 hours. The presence of oxirane ring of epoxidized rubber seed oil was confirmed by Fourier Transform Infrared Spectrometer (FT-IR) and proton nuclear magnetic resonance (~1H NMR) spectra analysis which displayed a disappearance of double bonds peak in rubber seed oil and an existing of epoxide ring peak in epoxidized rubber seed oil.
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