Abstract: It is well known that the sensitivity of an explosive charge is determined not only by the type of explosive, but also by its structure. So, with a decrease in the grain size, an increase in the shock wave sensitivity and a decrease in the critical diameter at bulk density are observed. A change in the charge structure of TNT can be achieved using various manufacturing methods, as well as by modifying the addition of an inert substance. In the present work, we studied the effect of an additive to the TNT charge on the detonation of the resulting mixture; single-walled carbon nanotubes were used as an additive. The choice of the method for modifying explosives is determined by the unique properties of nanotubes, which have high strength, conductivity, and thermal conductivity [1]. Previously, explosives with the addition of similar carbon nanotubes were studied in [2]. The pressed high-density RDX charge detonated at a rate higher than for a similar charge of pure RDX. The procedure for preparing a mixture of TNT + 0.5% nanotubes is similar to that described in [2]. During the condensation process, the explosive is deposited on the nanotubes contained in the solution. An interesting feature of the resulting substance is mixing at the submicron level. The resulting material is shown in Figure 1 on the right, on the left is a photo of a pure substance. Comparison of experimental data on the detonation of charges with a similar density of pure TNT and with the addition of nanotubes shows an increase in the detonation velocity for the mixture, which is equivalent to an intensification of the chemical reaction due to an increase in the concentration of hot spots.

Cite: Satonkina N.P. , Ershov A.P. , Kashkarov A.O. , Rubtsov I.A.
Comparison of the kinetics of chemical reactions during the detonation of a pure explosive and one modified with nanotubes
8th Asian Symposium on Advanced Materials ASAM-8 July 03 - 07, 2023 Novosibirsk, Russia 03-07 Jul 2023