Superior Thermostability, Good Detonation Properties, Insensitivity, and the Effect on the Thermal Decomposition of Ammonium Perchlorate for a New Solvent-Free 3D Energetic PbII -MOF

A new solvent-free energetic MOF, [Pb(HBTI)]n (1) (H3BTI = 4,5-bis(1H-tetrazole)-1H-imidazole), has been synthesized under hydrothermal and acidic conditions. It were characterized by elemental analysis, IR, TG, DSC and SEM. Single crystal X-ray diffraction analysis revealed that 1 features a rigid 3D framwork architecture without solvent molecules. Thermoanalysis demonstrated that the thermostability of 1 was up to 325 oC. Non-isothermal kinetic and apparent thermodynamic parameters of exothermic decomposition process of 1 were determined by Kissinger's and Ozawa's methods. Through oxygen-bomb combustion calorimetry, the standard molar enthalpy of formation of 1 was determined. The calculated detonation properties (heat of detonation, detonation velocity and detonation pressure) and sensitivity tests of 1 were carried out. In addition, 1 was explored as combustion promoter to accelerate the thermal decompositions of ammonium perchlorate (AP) by differential scanning calorimetry. Experimental results indicated that 1 possess potential application prospect in the field of explosive and propellant.