Research On Cocrystal Technology With TATB Explosive

In order to meet today’s explosive and weapons development requirements of theefficiency and safety, co-crystal, as a new modification technology, a kind of technologyimproving the performance of explosive from the molecular level, is a new research directionin the current high-energy insensitive. Insensitive high cocrystal explosives of TATB basedcan meet the request of ammunition with insensitive high energy and the request of weaponswith high security and low vulnerability, but the slightly solubility in ordinary solvents ofTATB is the difficulty and key point of TATB cocrystal explosive. In this paper the bestsolvent of TATB were analyzed and screened, and then through a combination of theory andexperiment, the TATB based explosive cocrystal technology has been studied, and thestructure, morphology and properties of TATB/HMX cocrystal were characterized. The maincontents are as follows:(1) The good solvent of TATB were been studied at home and abroad, the ionic liquid[Emim]Ac/DMSO complex solvent with the mass ratio5:95were certified the bestsolubility to TATB.(2) From the perspective of cocrystal mechanism, high explosive HMX with theappropriate functional groups and the suitable solubility has been elected to co-crystal withTATB. The TATB and HMX intermolecular hydrogen bond formation were simulated throughthe MS simulation software, and the feasibility of TATB/HMX co-crystal technology wasproved.(3) The influence of the TATB/HMX cocrystal technology has been studied, andperformance of the samples was characterized and analyzed. The ultrasound-assisted solvent/non-solvent method were used to synthesize TATB/HMX cocrystal with the ionic liquid[Emim]Ac/DMSO (the mass ratio5:95) complex solvent dissolving the weight ratio of3:7 of TATB and HMX, at a temperature of80℃, stirring intensity500r/min. The morphologyand performance of the TATB/HMX cocrystal explosives in above condition were showed tobe the best.(4) The morphology of TATB/HMX cocrystal explosives was more regular and the sizeof particles was approximately2μm.It is showed that TATB/HMX cocrystal explosives isdifferent from TATB and HMX on the crystal structure by XRD, Infrared and Ramanspectroscopy test. TATB and HMX were proved to be integrated at the molecular level, andthe intermolecular hydrogen bonds were formed.(5) The impact sensitivity of TATB/HMX cocrystal has decreased than raw materialHMX and the thermal stability has improved, and through the theoretical prediction, thedetonation velocity of TATB/HMX was higher than that of raw material TATB by19.4%,detonation pressure of TATB/HMX was higher than that of raw material TATB by17.7%. Itmeets the requirements development of IHE.