Thermal behavior, specific heat capacity and adiabatic time-to-explosion of G(FOX-7).

A new compound, ((NH2)2C=NH2) + N(NO2)2 - (GDN), was prepared by mixing ammonium dinitramide (ADN) and guanidine hydrochloride in water. The thermal behavior of GDN was studied under the non-isothermal conditions with DSC and TG/DTG methods. The apparent activation energy(E) and pre-exponential constant(A) of the exothermic decomposition stage of GDN were 118.75 kJ/mol and 10 10.86 s -1 , respectively. The critical temperature of the thermal explosion(Tb) of GDN was 164.09 °C. The specific heat capacity of GDN was determined with the Micro-DSC method and the theoretical calculation method, and the standard molar specific heat capacity was 234.76 J·mol -1 ·K -1 at 298.15 K. The adiabatic time-to-explosion of GDN was also calculated to be a certain value between 404.80 and 454.95 s. Keywords Guanidine dinitramide; Ammonium dinitramide; Thermal behavior; Specific heat capacity; Adiabatic time-to-explosion Article ID 1005-9040(2009)-01-076-05