Copper-Based Energetic Coordination Polymers Regulated by CN^– and NO₃^– for the Combustion Decomposition of Ammonium Perchlorate

Energetic coordination polymers (ECPs) have good application prospects as combustion promoters of solid propellants. In this work, based on a rigid proton-free nitrogen-rich ligand 1,3,5-tri(1H-1,2,4-triazol-1-yl)benzene (TTB) and an environmentally friendly copper ion, two ECPs, {[Cu6(TTB)2(CN)6]·CH3CN}n (1) and {[Cu(TTB)(NO3)2]·CH3CN}n (2), were prepared by the solvothermal method using an anion regulation strategy. X-ray crystallographic analyses, thermal stability, kinetic parameters of exothermic decomposition process, thermal safety performances, mechanical sensitivity, and theoretical detonation characteristics of two ECPs were, respectively, explored. Meanwhile, their promoting effects on the combustion decomposition of ammonium perchlorate were investigated by differential scanning calorimetry tests, thermal decomposition kinetics, and surface morphology analyses. Experimental results indicated that ECP 2 has good application potential in the solid propellant field.