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- Title
High-Temperature Structural Transformations of 1,1-Diamino-2,2-dinitroethene (FOX-7).
- Authors
Zakharov, Viktor V.; Chukanov, Nikita V.; Dremova, Nadezdha N.; Chervonnyi, Alexandr D.; Shilov, Gennadiy V.; Korsounskii, Boris L.; Kazakov, Anatoliy I.; Volkova, Nina N.
- Abstract
Stuctural transformations of 1,1-diamino-2,2-dinitroethene (FOX-7) were investigated in the temperature range 298-513 K by means of DSC, TG, isothermal calorimetry, PXRD, IR spectroscopy, and electron microscopy. The data obtained confirm the existence of the high-temperature δ-FOX-7 polymorph stable above 480 K. The heat effect of the γ→δ transformation is − 4.6 J g−1 (−680 J mol−1). Metastable γ-phase formed in the reverse process δ→γ has a perfect crystal structure and is stable towards thermal decomposition. Possible mechanisms of sharp deceleration of thermal decomposition of FOX-7 at the 40 % conversion are discussed.
- Subjects
NITROETHYLENE; POLYMORPHIC transformations; THERMAL stability
- Publication
Propellants, Explosives, Pyrotechnics, 2016, Vol 41, Issue 6, p1006
- ISSN
0721-3115
- Publication type
Article
- DOI
10.1002/prep.201600071