J. K. Nair

Influence of metal salts of 4-(2, 4, 6-trinitroanilino) benzoic acid on the burnining rate of double base propellants

Abstract Cobalt, Nickel, Copper and Lead salts of 4-(2, 4, 6-trinitroanilino) benzoic acid have been evaluated as ballistic modifiers in double base propellant formulations. Measurements showed considerable increase in burning rate over the control propellant, in presence of salts at all pressures in the range 3.43 – 8.82 MPa. The effect of the lead salt, however, was more pronounced and showed a burning rate increase of 50 – 60%; the lower pressure ranges showing higher burning rate enhancement. The salts decompose exothermically: cobalt salt at 270°C (initiation), nickel salt at 300°C, copper salt at 240°C and lead salt at 260 °C.

Transition metal salts of 2, 4, 6-trinitroanilinobenzoic acid - potential energetic ballistic modifiers for propellants

Abstract Iron (Fe2+ and Fe3+), cobalt and nickel salts of 2,4,6-trinitroanilino benzoic acid have been synthesized, and characterized by elemental analysis, IR, metal content and explosive properties like impact and friction sensitivity. Differential thermal analysis shows the thermal stability of these salts as: ferrous, 270°C; ferric, 280°C; cobalt, 270°C; and nickel, 300°C. The impact sensitivity (h50%) of these salts are > 170 cm except for Fe3+ salt (156 cm). The friction sensitivity of all the salts were found to be > 36 kg. The salts were found to be devoid of any free acid present in them.