Optimal compositions of metal-free energetic compositions with variation in the oxidizer concentration and the ratio of nitro and difluoroamine groups

A thermodynamic analysis of the energy characteristics and combustion products of model mixtures based on polyethylene, tetranitromethane, and tetra(difluoroamino) methane is performed. Optimal ratios of the components are determined, and the maximum specific impulse was found for combustion of compositions in which the gram-atomic concentrations of hydrogen and fluorine are equal and, simultaneously, those of carbon and oxygen are equal. It is studied how the composition of the combustion products changes with a change in the ratio of the fuel components and how this is reflected in the value of the specific impulse.