Diaminofurazan (DAF): Thermolysis and evaluation as ballistic modifier in double base propellant.
Diaminofurazan (DAF) is used as a precursor in the synthesis of many high performance insensitive high explosives. This paper reports the thermal studies on DAF and its evaluation as a ballistic modifier in double base propellant formulations. Differential scanning calorimetry (DSC) and differential thermal analysis (DTA) revealed that DAF shows two-stage decomposition, whereas the kinetics of initial stage of thermal decomposition of DAF evaluated from TG data gave activation energy (E(a)) of 67 kJ mol(-1). The evolution of gases containing species such as CN, NH, OH and oxides of nitrogen during thermal decomposition of DAF was also revealed by hyphenated TG-FTIR data. Evaluation of DAF as a ballistic modifier in RDX incorporated double base propellant formulations indicated that it brings down the pressure index to 0.20 compared to 0.70 for a control composition in the pressure range 6.9-8.8 MPa when used in combination with basic lead salicylate (BLS). It was observed that DAF does not have adverse effect on vulnerability and chemical stability of the propellant formulation.
Talawar
M B
MB
High Energy Materials Research Laboratory, Pune 411021, India.
Nair
J K
JK
Pundalik
S M
SM
Satpute
R S
RS
Venugopalan
S
S
D002152:Calorimetry, Differential Scanning; D004055:Differential Thermal Analysis; D053834:Explosive Agents / Q000737:chemistry*; D006878:Hydroxides / Q000737:chemistry; D013058:Mass Spectrometry; D010069:Oxadiazoles / Q000737:chemistry*; D017680:Potassium Compounds / Q000737:chemistry; D013055:Spectrophotometry, Infrared; D017550:Spectroscopy, Fourier Transform Infrared; D013816:Thermodynamics; D013818:Thermogravimetry
C515533:3,4-diaminofurazan; D053834:Explosive Agents; D006878:Hydroxides; D010069:Oxadiazoles; D017680:Potassium Compounds; C029943:potassium hydroxide