Home – Home – Jornals – Combustion, Explosion and Shock Waves 2025 number 2

This paper describes the process of obtaining homogeneous mixtures of RDX, HMX, PETN, TNT, Fox-7, and benzotrifuroxane of various dispersions with polysiloxane (SKT) as an inert soft polymer. The specific surface area of crystalline explosives (HE) varies from 440 to 4750 cm²/g, and the explosive content in the mixtures ranges from 65 to 82% (wt.). Each binary mixture (explosives/polysiloxane) yields solid, practically nonporous, flat (round ones with a diameter of 40 mm and square ones with a size of 40 × 40 mm) charges of various thicknesses and elongated cylindrical (cord) charges of various diameters. Flat and cord charges are characterized by the same composition, dispersion, density, and defectiveness of explosive crystals. Critical thicknesses and critical diameters of detonation of all mixtures are determined experimentally with an accuracy of 0.05 mm. Test conditions: flat and cord charges without shells located on a metal base. It is revealed that the ratio of the critical diameter to the critical thickness of detonation is practically constant and equal to 1.83 ± 0.1. The previously obtained dependence of the critical detonation diameter of explosives and explosive mixtures on the change porosity is also taken into account. An equation for the correct recalculation of the experimental critical detonation thickness of pressed charges of crystalline explosives with real porosity into the critical detonation diameter of high-density charges is obtained. This equation is additionally confirmed by testing many individual explosives of different dispersion and known literature data conducted in this work.