Measurement of moisture outgassing of the plastic-bonded TATB explosive LX-17

► A system to directly and exclusively monitor moisture outgassing was constructed. ► Moisture outgassing from plastic-bonded TATB at 65°C was monitored for 2 weeks. ► Moisture outgassing occurred mainly in the first 10–20h, reaching 50–70ppm. ► The data agreed with previous studies and a recently d...

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Bibliographic Details
Published in:Thermochimica acta 2012-10, Vol.545, p.90-95
Main Authors: Small, Ward, Glascoe, Elizabeth A., Overturf, George E.
Format: Article
Language:English
Subjects:
Aluminum oxide
ambient temperature
Chambers
Chemical thermodynamics
Chemistry
Exact sciences and technology
Explosions
Explosive
General and physical chemistry
General. Theory
heat
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
LX-17
Mathematical models
Moisture
nitrogen
OTHER INSTRUMENTATION
Outgassing
prediction
stainless steel
TATB
Water
Water vapor
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Summary:► A system to directly and exclusively monitor moisture outgassing was constructed. ► Moisture outgassing from plastic-bonded TATB at 65°C was monitored for 2 weeks. ► Moisture outgassing occurred mainly in the first 10–20h, reaching 50–70ppm. ► The data agreed with previous studies and a recently developed kinetic model. Moisture outgassing during isothermal heating of LX-17, a plastic-bonded explosive consisting of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB), was monitored. A moisture outgassing measurement system was constructed to directly monitor the water vapor released from the heated material in real time using an aluminum oxide probe mounted in the stainless steel sample chamber. The total pressure in the sample chamber was also monitored. After an initial high vacuum pump down at room temperature and nitrogen backfill, solid samples were heated and monitored for 2 weeks at 65°C. Moisture outgassing occurred mainly in the first 10–20h, reaching approximately 50–70ppm (parts water per million parts LX-17). The total pressure exceeded the water vapor partial pressure, indicating that outgassing of other species occurred. Good agreement (within an order of magnitude) with previous moisture outgassing studies on TATB-based materials was demonstrated. In addition, the data appeared to validate use of a recently developed kinetic model for predicting moisture outgassing rates of solid TATB formulations.
ISSN:0040-6031
1872-762X
DOI:10.1016/j.tca.2012.06.033