Effect of pressure on TATB and LX-17 thermal decomposition

Burnham, Alan K.; Stanford, Victoria L.; Vyazovkin, Sergey; Kahl, Evan M.

doi:10.1016/j.tca.2021.178908

Effect of pressure on TATB and LX-17 thermal decomposition

Journal Article · Fri Feb 19 00:00:00 EST 2021 · Thermochimica Acta

DOI:https://doi.org/10.1016/j.tca.2021.178908· OSTI ID:1787799

^[1]; Stanford, Victoria L. ^[2]; Vyazovkin, Sergey ^[2]; Kahl, Evan M. ^[3]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); M.H. Chew & Associates, Livermore, CA (United States)
Univ. of Alabama, Birmingham, AL (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

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^-1. 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.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE; USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1787799

Alternate ID(s):: OSTI ID: 1781851

Report Number(s):: LLNL-JRNL--817935; 1027733

Journal Information:: Thermochimica Acta, Journal Name: Thermochimica Acta Vol. 699; ISSN 0040-6031

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
LX-17
Pressure
TATB
Thermal decomposition kinetics

Effect of pressure on TATB and LX-17 thermal decomposition

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