Recrystallization and properties of LLM-105

The recrystallization of 2, 6-diamino-3, 5-dinitropyrazine-l-oxide (LLM-105) was studied. Results show that mean particle diameter, purity and impact sensitivity of LLM-105 may be quite different by different crystallization methods. The products obtained by cooling crystallization and solvent (DMOS)-nonsol vent (hot water) crystallization have low impact sensitivity, the value of H₅₀ are 120.0 cm and 108.3 cm. Thermal properties of LLM-105 were studied by DSC-TG, VST, TG and thermal explosion test. Thermal properties parameters of LLM-105 are shown respectively: DSC exothermic onset temperature is 341.2°C (heating rate 10°C·min^-1); VST: 0.016 mL·g^-1/120°C/48 h; loss of weight: 0.13%/120°C/48 h; thermal explosion temperature for 5 s explosion delay is 367.5°C. The results of VST show that LLM-105 has good compatibility with HMX, AS, F₂₃₁₁, F₂₃₁₄ and estane. Measured detonation velocity of LLM-105 (LLM-105/F₂₃₁₄=95/5, 1.845 g·cm^-3, 96.4% TMD) is 7991 m·s^-1. The experimental results of pressure-density curve show that LLM-105 has good pressing-molded property.