The influence of high-energy electron beam irradiation on melamine resin, phenol-formaldehyde resin and acrylonitrile-butadiene rubber blend was studied. The response of the studied material to 5 MeV electron beam irradiation with doses from 77 up to 284 kGy was examined and compared to non-irradiated material using the attenuated total reflection Fourier transform infrared spectroscopy. The infrared spectra were acquired in an absorbance mode for wavenumbers ranging from 4000 to 450 cm-1.The effect of electron beam radiation on the chemistry of the irradiated material was proven by varying the peak intensity for the absorption bands of the functional groups of the blend and its individual components. The infrared spectrum analysis demonstrated that at radiation doses of up to 150 kGy in the test blend, the intensity of the radiation-induced cross-linking reactions prevailed over the intensity of the polymer chain cleavage reactions and the breaking of the intermolecular bonds between them. At higher doses of absorbed radiation, radiation-induced degradation processes begin to dominate.