a,* , Djalal

Lokmene Boumaza

doi:10.1016/j.jaap.2024.106564

a,* , Djalal

2024-06-01

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DOI：10.1016/j.jaap.2024.106564

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The current work examined the properties and thermal decomposition mechanism of a double -base propellant comprising nitrocellulose (NC), diethylene glycol dinitrate (DEGDN), and organic stabilizers. To achieve this objective, a comprehensive analysis was conducted on the influence of stabilizers, namely 2-nitrodiphenylamine (2-NDPA), 1,3-dimethyl-1,3-diphenylurea (MC), and kraft lignin, on the characteristics and pyrolysis gases of NC/DEGDN. Experimental findings demonstrated that kraft lignin has a good stabilizing efficiency, similar to that of 2-NDPA and MC stabilizers. Moreover, differential scanning calorimetry (DSC) experiments revealed that the incorporation of MC, 2-NDPA, and Kraft lignin has increased the maximum peak temperature of the main thermolysis process from T peak = 192.1 degrees C for NC/DEGDN baseline to T peak = 194.5 degrees C for NC/DEGDN/MC, T peak = 193.3 degrees C for NC/DEGDN/2-NDPA, and T peak = 194.3 degrees C for NC/DEGDN/Kraft lignin. In addition, differences in the stabilization mechanism for each stabilizer were examined using thermogravimetry connected to an infrared spectroscopy (TGA-FTIR). The obtained findings highlighted the discernible influence of stabilizer types on the gaseous products of NC/DEGDN propellant, particularly elucidating their effects on the intensity and type of nitrogen oxides generated throughout the pyrolysis process.

Keywords:

Double -base propellant

Kraft lignin

Stabilizers

Thermal behavior

Pyrolysis

a,* , Djalal

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