Passivation of Ammonium Nitrate Surface for Use in Minol-2
PICATINNY ARSENAL DOVER NJ
Pagination or Media Count:
Prilled, spheroidized, and granular ammonium nitrate AN was coated with polychloro-p-xylylene parylene C by a vapor deposition polymerization technique. Particles of AN with a 0.2 coating remain free flowing after long exposure to ambient conditions. The effectiveness of the coating as a moisture barrier on the three forms of AN was found to be in the order, spheroids prills granules. Water adsorption isotherms and hygroscopicity determinations indicate that a 0.7 coating hydrophobes the surface of AN by approximately one order of magnitude. The parylene CAN interface exhibits chemical and physical stability Minol-2 matrix, and tends to inhibit reactivity between AN and TNT. The thermal sensitivity of Minol-2 to initiation is unaffected by a 0.7 coating.
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- Ammunition and Explosives