Raman spectroscopy as a tool for long-term energetic material stability studies

Raman spectroscopy is shown to be useful as a tool for long-term stability studies. The stability of a novel submicron-size γ-polymorph form of the explosive HMX (octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine) was monitored up to 1 year using Raman spectroscopy. The preparation and characterization of this submicron HMX has been previously discussed. It is important to know the long-term stability of this submicron γ-polymorph material under ambient conditions for its eventual utilization. This submicron HMX material has been found to be stable both chemically and polymorphically (to the order of 1% impurity level), even though HMX normally converts to the β-polymorph at ambient conditions. Copyright © 2007 John Wiley & Sons, Ltd.