ABSTRACT
The ammonium salt o f dinitramide ( A D N A ) N H 4 + N ( N 0 2 ) 2 _ is the key compound o f a new class o f inorganic substances: the salts o f dinitramide ( D N A ) synthesized in 1970 [14.1]. A D N A is considered as a challenging high-energy oxidizer for ecologically pure solid rocket propellants and, thus, information about its thermal decomposition is o f considerable interest. The applied problems of the thermal stability o f A D N A are briefly considered in [14.2]. In the same paper, a unique characteristic feature o f A D N A was emphasized: a clearly expressed decomposition at temperatures near 60°C. The term "anomalous decomposition" was introduced in [14.2] to designate the unusual effects observed during the decomposition of D N A salts: the increase o f the decomposition rate on transition from the melt to the solid state and the negative activation energy within a narrow temperature range, which, as was found later, is adjacent to the melting point o f the eutectic o f a salt with nitrate o f the corresponding cation. A t present, many problems concerning either the stability o f A D N A as a component o f rocket propellants (including the role o f impurities and the problem o f stabilization), or the mechanism o f the slow thermal decomposition of the N 3 0 4 ~ anion have been solved to a great extent [14.314.6]. There are also indications of A D N A decomposition in open systems at high temperatures, approaching the combustion temperature [14.7, 14.8].
