Effects of additives on the crystal morphology of TATB

摘要

The morphology controlling of TATB (1,3,5-triamino-2,4,6-trinitrobenzene) can help to control preferred orientation and anisotropic expansion of TATB based PBXs, as well as to improve crystal quality, desensitizing efficiency, packing density, and even explosive energy. This paper investigates the effects of additives on the crystal morphology of TATB. It is shown that the additives that can form hydrogen bonds with TATB molecules lead to near-spherical crystals, while additives with big conjugated n-bonds lead to platy crystals. This can attribute to the different interaction between the solvents and different face of TATB crystals. The solvents with hydrogen bond acceptor and donor are easy to attach to the {100} and {010} face, and will restrict the crystal growth of these faces. Subsequently, they will be more morphology important and have stronger diffraction peak in the XRD pattern. By π-staking interaction, the additives containing aromatic n-bonds can restrict the crystal growth of {001} face, and make it the most morphological important crystal face, only whose diffraction peak can be observed in the XRD patterns. The results of this investigation will provide some guide for the crystal morphology controlling of TATB.