EFFECT OF POLYMORPH TRANSFORMATION OF НМХ AFTER THERMAL TREATMENT ON ITS SENSITIVITY TO IMPACT FRICTION

HMX after heat treatment was investigated through different methods on dynamics of inverse from the unstable form in stable or metastable. Results of differential scanning calorimetry are most indicative in studies of polymorph transition in НМХ. The analysis demonstrates, that in one day after hearting there is an essential change of crystalline structure HMX, it stabilization comes in 3-5 day/ Sensitivity to mechanical effects (to friction) valued on a standard pile driver technique. From the data, it is visible, that, despite of completion of intracrystalline processes, the sensitivity to mechanical effects heated HMX even after long-lived endurance remains on a very high level. Friction sensitivity of macrocrystalline and finely divided HMX after heating, which causes polymorph transition in δ-modification, are comparable with sensitivity of primary explosives (even after long storage HMX)