Preparation and properties of co-mixed crystals of 1,3-di- and 1,3,5-triamino- 2,4,6-trinitrobenzenes with attractive cyclic nitramines

다국어 초록 (Multilingual Abstract)

Co-agglomeration was used to prepare co-mixed crystals of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB)with RDX, b-HMX, BCHMX and e-CL-20. The molecular rearrangements in mixed crystals were verifiedusing Raman, FTIR, and PXRD techniques. The significant stretching vibrations indicated that the resultantco-agglomerates (CACs) are co-crystals (CCs), where HMX appears in its d-modification and CL-20in its b-modification. Logical relationships, described already for the 1,3-diamino-2,4,6-trinitrobenzene(DATB) CACs, between some FTIR and Raman vibrational modes and parameters of their initiation anddetonation, after extending with the data for the TATB analogues, produced greater predictability. Thedensities of TATB CACs are higher than those of the pure nitramines (including b-CL-20). An evaluationof the dependence of the impact sensitivity on the performance or energy content in the DATB andTATB CACs is consistent with the Licht’s rule with some exceptions for DATB and an unambiguous relationshipfor the use of the heat of combustion as a representative of performance for TATB. This sensitivityis quite strongly reduced in the TATB CACs compared to their DATB analogues. The detonationenergies of the DATB and TATB CACs are higher than would be expected from the percentage of coformersin them. Among the CACs studied, the most interesting appears to be HMX/TATB, which has adensity slightly greater than pure HMX, with only slightly reduced detonation parameters, while itsimpact resistance is extremely high.

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