Kinetics and heats of sublimation and evaporation of 1,3,3-trinitroazetidine (TNAZ)

TNAZ (1,3,3-trinitroazetidine) is a relatively new, powerful, steam castable, strained ring explosive. Owing these characteristics it is of considerable interest to the energetic material community. A relatively high vapour pressure, volume contraction and formation of shrinkage cavities in the solidification of its melt may be considered as some of its disadvantages. The kinetics and heats of TNAZ sublimation and evaporation were studied by the non-isothermal and isothermal thermogravimetry method. The activation energy of 94-102 kJ mol^-1 was found for TNAZ sublimation, while the activation energy of 60-81 kJ mol^-1 was found for TNAZ evaporation. The enthalpy of TNAZ sublimation at the melting temperature was found to be 95 kJ mol^-1, and the enthalpy of TNAZ evaporation equals 66 kJ mol^-1. This revised version was published online in July 2006 with corrections to the Cover Date.