A STUDY OF SYSTEMS INVOLVING TRINITROTOLUENE, RDX, NENO, AND DINITROBENZENE, WITH PARTICULAR REFERENCE TO THE COMPOSITION OF THE BINARY EUTECTICS

The eutectic temperature and composition were determined by thermal analysis for the systems: TNT–RDX, TNT–NENO, and DNB–NENO. The velocity of crystallization of pure RDX, as well as of the eutectic mixture of TNT–RDX, was studied. Density determinations were made on the pure materials, TNT, RDX, NENO, and DNB, as well as on the eutectic mixtures mentioned above. Where possible, the densities of both molten and solid forms were determined, and the contraction on solidification calculated. An attempt was made to establish the existence of a transition point in the allotropic transformations of NENO. The attempt failed, possibly because the allotropy is monotropic: there seems no reason to doubt the existence of allotropic modifications of NENO.