Reduced sensitivity RDX, HMX and PETN crystallized from propylene carbonate in a presence of stearic acid

摘要

Energetic materials were crystallized from propylene carbonate solutions with different additives. From tested additives, stearic acid causes formation of more spherical and less defect crystal materials. Obtained reduced sensitivity RDX was less impact sensitive in comparison with starting material (7.5 J and 15 J resp.) and also less friction sensitive (110 N starting RDX, 160 N crystallized). HMX and PETN were also less sensitive and nearly without internal defects and inclusions. Remaining stearic acid in crystal material (0.05 - 0.2%) doesn't change stability parameters and melting point of obtained safer explosives. The advantage of propylene carbonate as a solvent is low price, nontoxic nature and low volatility making crystallization process much safer. Propylene carbonate doesn't form combustible vapours up to a temperature of 130°C. Solutions can be used more than 30 times.