[en] The progress accomplished in the electron beam curing of rubbers during the last years has resulted in a very promising new technology. The radiation doses required to cross-link dry rubbers are generally too high. Low irradiation doses are required for the process efficiency and a high dose rate must be used to give large production capacities. The research results show that the addition of certain chemical sensitizers markedly reduced the radiation dose required for an optimum cross-linked. The study described in this paper has been carried out in order to find a new method to reduce the required vulcanization dose by additional use of microwave energy to electron beam energy. From the point of the economic feasibility low intensity-high energy electron accelerators will be favorable for rubbers vulcanization. The vulcanization process of rubber mixtures based on natural rubber and polybutadiene rubber with carbon black, under electron beam and/or microwave was studied. Different doses of irradiation and different lengths of electron beam action were involved. The mechanical properties (modulus, tensile strength, break elongation and residual elongation) of the obtained vulcanized rubbers were determined. The vulcanization degree is strongly influenced by the irradiation dose and the type of treatment: only electron beam or a combined electron beam/microwave procedure. The mechanical properties also depend on the time of microwave applied. In the absence of microwave, irradiation doses of 15-20 Mrad are required in order to obtain a higher vulcanization degree. In the presence of microwaves, this irradiation dose may be diminished to 5-7.5 Mrad (at 60 W microwave power) and even to 1.5-2.5 Mrad (at 100 W microwave power). Experiments were carried out using an electron linear accelerator, ALID-7, of 5.5 MeV and 0.7 kW output power and a 2.45 GHz microwave source of controlled power up to 0.85 kW. (author)