An Investigation on Thermal Decomposition of DNTF‐CMDB Propellants

Abstract

The thermal decomposition of DNTF‐CMDB propellants was investigated by pressure differential scanning calorimetry (PDSC) and thermogravimetry (TG). The results show that there is only one decomposition peak on DSC curves, because the decomposition peak of DNTF cannot be separated from that of the NC/NG binder. The decomposition of DNTF can be obviously accelerated by the decomposition products of the NC/NG binder. The kinetic parameters of thermal decompositions for four DNTF‐CMDB propellants at 6 MPa were obtained by the Kissinger method. It is found that the reaction rate decreases with increasing content of DNTF.

Thermal and Combustion Properties of 3,4‐Bis(3‐nitrofurazan‐4‐yl)furoxan (DNTF)

“…16 [ E a =58.8 kJ mol −1 , log A =0.47] and from Ref. 17 [ E a =138.2 kJ mol −1 , log A =11.06], the differences in the rates of DNTF decomposition at the same temperature proves to be almost three orders of magnitude.…”

“…The possibilities of replacement of RDX by DNTF as the energetic component in composite modified double base (CMDB) propellants were studied in Refs. 17, 20. When RDX was partly replaced by DNTF, the burning rate of the propellant and the pressure exponent increased in the studied pressure range.…”

Researches on Thermal Decomposition Kinetics of Composite Modified Double‐base Propellants

“…The thermal decomposition mechanism of MDBR-1 with the conversion from 0.2 to 0.4 was f(α)＝1/2α, the conversion from 0.5 to 0.7 was f(α)＝(1/4)(1-α)× [-ln (1-α)] -3 ; the thermal decomposition mechanism of MDBR-2 was f(α)＝(1-α) 2 ; the thermal decomposition mechanism of MDBR-3 was f(α)＝(3/2)(1-α) 4/3 × [(1-α) -1/3 -1] -1 ; the thermal decomposition mechanism of MDBR-4 was f(α)＝1-α; the thermal decomposition mechanism of MDBR-5 was f(α)＝1/(2α). …”

“…T eo , T i , T p , T f , T b , T a , E, lg A and ∆H are very important parameters in determining the stability of propellants. [1][2][3][4][5][6][7][8][9][10] In order to explore the thermal decomposition mechanisms of composite modified double-base propellant and obtain kinetic parameters, such as apparent activation energy (E), the isoconversional methods [11][12][13][14] and the Malek method [15][16][17][18] were employed according to suggestions of ICTAC (International Confederation of Thermal Analysis and Calorimetry). 19,20 The supposition of decomposition mechanism function is not needed for Flynn-Wall-Ozawa method and the computation is simpler than other methods.…”

Direct Deposit of Highly Reactive Bi(IO3)3‐ Polyvinylidene Fluoride Biocidal Energetic Composite and its Reactive Properties

“…[21] In addition, a film structure is ideal for evaluation of mechanical and combustion properties due to a well-defined geometry and architecture. [22][23][24] One generic problem in any film formulation based on casting is that high loading of nanoparticles are difficult to achieve due to the rapid increase in viscosity of the mixture. This can also lead to an aggregation, inhomogeneous mixture, and poor mechanical properties.…”