Dissolution properties of N -guanylurea dinitramide (GUDN) in dimethyl sulfoxide and N -methyl pyrrolidone

The enthalpies of dissolution of N -guanylurea dinitramide (GUDN) in dimethyl sulfoxide (DMSO) and N -methyl-2-pyrrolidone (NMP) were measured using an RD496-2000 Calvet microcalorimeter at 298.15 K under atmospheric pressure, respectively. Empirical formulae for the calculation of the enthalpy of dissolution (Δ diss H ), relative partial molar enthalpy (Δ diss H partial ), and relative apparent molar enthalpy (Δ diss H apparent ) were obtained from the experimental data of the dissolution processes of GUDN in DMSO and NMP. Furthermore, the corresponding kinetic equations describing the two dissolution processes were d α /d t = 10 −3.39 (1 − α ) 0.70 for the dissolution of GUDN in DMSO, and d α /d t = 10 −4.06 (1 − α ) 1.11 for the dissolution of GUDN in NMP.