N, N ' -二(氟偕二硝基乙基)-3, 4-二硝胺呋咱(LLM-209)的晶体结构及热分解性质

N, N'-Bis(fluorodinitroethyl)-3, 4-diamino furazan(LLM-208)was nitrated using the nitration system of 98% fuming nitric acid/acetic anhydride(10: 8 in volume)at 0℃. N, N ' -bis(2-fluoro-2, 2 '-dinitroethyl)-3, 4-dinitraminefurazan(LLM-209) was prepared from LLM-208. The single crystal of LLM-209 was obtained by volatilization culture in anhydrous methanol. The single crystal structure was measured by X-ray single crystal diffractometer. The thermal decomposition of LLM-209 was studied by thermogravimetry and differential scanning calorimeter(TG-DSC). The gaseous products of thermal decomposition of LLM-209 were measured by TG-IR. The detonation velocity and detonation presure of LLM-209 were predicted by EXPLO5 (V6.02)program. Its impact and friction sensitivities were measured by sensitivity test.Results show that the crystal of LLM-209 belongs to the monoclinic system, space group P2₁/n, and its density at 298 K is 1.94 g•cm^-3. LLM-209 has a melting endothermic peak at 94.27℃ and two distinct decomposition exothermic peaks at 179.96℃ and 233.86℃. The gaseous products of thermal decomposition of LLM-209 are mainly NO₂, CO₂, CO and N₂O. The theoretical detonation velocity and detonation presure of LLM-209 are 8981 km •s^-1 and 40.3 GPa, respectively, and the impact and friction sensitivities are 4 J and 48 N, respectively.