Kinetic investigation on thermal decomposition of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) nanoparticles

► The effect of heating rate on the thermal decomposition of RDX was studied. ► The Ea for the decomposition of each sample was calculated by Kissinger and Ozawa methods. ► The critical temperature of thermal explosion of the compound was calculated. ► The influence of particle size on the thermal decomposition was verified. ► The values of ΔS#, ΔH# and ΔG# of decomposition reaction for each particle size were also computed.