Synthesis of the Tetrazolium Derivatives for Ionic Liquid Rocket Fuel and a Study of Their Ignition Delay Time and Viscosity

In order to use the liquid rocket fuel, 1,5-diamino-4-methyltetrazolium azide, [DMT]+[N3]－ and 1,5-diamino-4-methyltetrazolium cyanide, [DMT]+[CN]－ were synthesized and prepared the ionic liquid rocket fuel after dissolving the synthesized solid-type energetic chemicals in hydrazine, respectively. The thermal decomposition temperatures(Td) and densities(d) of the prepared ionic liquid rocket fuels were about 200 ℃ and above 1.0 g/cm3 respectively. The ignition delay times(Idt) of the ionic liqud rock fuels with [DMT]+[N3]－ and [DMT]+[CN]－ were in a range of 26.6 - 82.5 ms and the 44.0 - 98.5 ms, respectively. These results mean that the synthesized tetrazolium salts could be used as an ionic liquid rocket fuels. The viscosities of the ionic liqud rock fuels with [DMT]+[N3]－ and [DMT]+[CN]－, which were dissolved in mixture solution of hydrazine/2-hydroxyethylhydrazine were to be 1.34 - 101 cP, and 1.29 - 80.5 cP, respectively. The synthesized ionic liquid rocket fuels in this study could be used as rocket fuel because the [Idt(100 ms or less), Td(150 ℃ or more), d(1.00 g/cm3 or more), and η (40.0~ 100 cP)] were achieved to satisfy the range of the used liquid rocket fuels.