Vapour pressure measurements on some organic high explosives

Abstract

Equilibrium vapour pressures of 1,3,5-trinitrobenzene (TNB), 2,4,6-trinitrotoluene (TNT), 2,4,6-trinitro-m-xylene (TNX), 2,4,6-trinitromesitylene (TNM), 2,4,6-trinitroaniline (TNA), 2,4,6-trinitro-m-phenylene diamine (DATB), 2,4,6-N-tetranitro-N-methylaniline (Tetryl), 2,4,6-trinitrophenol (picric acid), 2,4,6-trinitroresorcinol (styphnic acid, TNR), 2,4,6-trinitro-m-cresol (TNC), pentaerythritoltetranitrate (PETN), cyclotrimethylenetrinitramine (RDX), sym-cyclotetramethylene-tetramitramine (HMX) and nitroguanidine have been measured over a range of temperature using the Knudsen cell technique. The data were found, within the limits of experimental error, to follow the Clausius–Clapeyron equation and values for the constants A and B in the integrated form of the equation log₁₀p/N m^{– 2}=A–B/T determined. The standard enthalpies, entropies and Gibbs energies for sublimation are quoted.