Thermal decomposition of energetic materials. 55. Metal Complexes of Diamioglyoxime as Potential Burn Rate Modifiers in composite propellants

Metal complexes having the potential to modify the burn rate of rocket propellants are described. These are the diaminoglyoxime (DAG) complexes: Co(DAG–H) 2 ·DAG, Cu(DAG–H) 2 ·DAG, Ni(DAG–H) 2 and Pd(DAG–H) 2 . The thermal decomposition was characterized by DSC, TGA and IR spectroscopy at a heating rate of 5°C/min, and by fast thermolysis/FTIR spectroscopy at 100–250°C/s. The M(DAG–H) 2 complexes are more thermally stable than M(DAG–H) 2 ·DAG. However, all of the compounds produce highly thermally stable residues which would be expected to retard the heat and mass transfer at a burning surface. The residues most closely resemble coordination complexes of the metal and polymeric cyclic azine compounds. The crystal and molecular structure of the previously unreported complex Ni(DAG–H) 2 ·HCL is described.