Reduction of Palladium Compounds in the Wave of Nitrocellulose Flameless Combustion in Ballasted Systems

The flameless combustion of nitrocellulose in ballasted mixtures consisting of hexamethylene diisocyanurate trimer as an organic binder and palladium (II) chloride or dichlorodiammine palladium was found to produce a highly porous polymeric matrix containing nanosized metal particles in the coarse (20–50 nm) and fine (<10 nm) fraction. It was shown that the coarser nanoparticles obtained from the mixtures containing palladium chloride have a rounded shape; in the presence of dichlorodiammine palladium, the particles are polyhedral. A partial insertion of hydrogen from the products of flameless nitrocellulose partial conversion into the crystal lattice of metal particles with the formation of palladium hydride (PdH0.706) was detected.