The Use of Inverse Gas Chromatography (IGC) to Determine the Surface Energy of RDX

Abstract

AbstractThe surface properties of RDX play an important role in enhancing mechanics performances of the propellants and explosives. In this work, thereby, inverse gas chromatography (IGC) using various probe liquids as the medium was used to determine the surface energy components of RDX containing both dispersive and polar components, which were acquired respectively from neutral probe liquids (such as n‐hexane, n‐heptane, n‐octane) and polar probe liquids (such as chloroform, benzene, methanol). The results show that RDX located in different column temperatures has difference in the surface energy and possesses more surface energy when there is high temperature. The calculated formula of the total surface energy with temperature is: $\rm{ {\rm{\gamma }}_{\rm{s}}^{\rm{T}} {\rm{ = }} - {\rm{82}}{\rm{.16}} + }$ $\rm{{\rm{0}}{\rm{.3557}}T}$, and it is also found that dispersive, polar, electron acceptor, and electron donor components of RDX are $\rm{{\rm{\gamma }}_{\rm{s}}^{{\rm{LW}}} {\rm{ = }} - {\rm{53}}{\rm{.29}} + {\rm{0}}{\rm{.2560}}T}$, $\rm{ {\rm{\gamma }}_{\rm{s}}^{{\rm{AB}}} {\rm{ = }} - {\rm{28}}{\rm{.57}} + {\rm{0}}{\rm{.09889}}T}$, $\rm{ {\rm{\gamma }}_{\rm{s}}^{\rm{ + }} {\rm{ = }} - {\rm{25}}{\rm{.82}} }$ $\rm{+ {\rm{0}}{\rm{.08943}}T}$, and $\rm{ {\rm{\gamma }}_{\rm{s}}^ - {\rm{ = }} }$ $\rm{- {\rm{7}}{\rm{.932}} + {\rm{0}}{\rm{.02743}}T}$, respectively. These results demonstrate that the dispersive component is the primary part of the total surface energy, and RDX has an acid performance.