Effect of pressure on TATB and LX-17 thermal decomposition [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 541.3 Miscellaneous topics in physical chemistry
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. National Nuclear Security Administration ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2021
• Mô tả vật lý: Size: Article No. 178908 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 257111
• Chủ đề: 1. 37 inorganic, organic, physical, and analytical chemistry; 2. Lx-17; 3. Pressure; 4. Tatb; 5. Thermal decomposition kinetics

Tóm tắt

 Thermal decomposition of TATB (1,3,5-triamino-2,4,6-trinitrobenzene) and its formulation LX-17 is studied at pressures from 0.1 to 7 MPa for both isothermal heating at 340 K and ramped heating at 1 to 6 K min<
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 . Conditions that eliminate self-heating are thoroughly explored to avoid experimental artifacts. The increase in pressure accelerates the rate of decomposition by only about 10 %, but it substantially increases the enthalpy of the reaction, presumably because of longer volatile product residence times in the heated zone. The narrowness of the decomposition profile and the acceleratory phase during isothermal pyrolysis are consistent with a multistep autocatalytic mechanism, and the lack of a significant pressure effect suggests that the autocatalytic species have low volatility. The apparent activation energy is about 210 kJ/mol.