Thermal behavior of pentaerythritol diazido dinitrate

Add time:07/17/2019    Source:sciencedirect.com

Under non-isothermal condition, the thermal behavior of pentaerythritol diazido dinitrate (PDADN) is studied using TG, DSC, pressure DSC and the simultaneous device of the solid reaction cell in situ/rapid scanning Fourier transform infrared (RSFT-IR) spectroscopy. The results show that (1) the extrapolated onset temperatures (Te), peak temperatures (Tp) and enthalpy of decomposition (ΔHdec) increase obviously with the change of pressure from 0.1 to 2 MPa. Over the range of pressure from 2.0 to 6 MPa, the thermal behavior of PDADN does not seem to be obviously affected by the pressure; (2) the apparent activation energy, pre-exponential constant and the most probable integral mechanism function of thermal decomposition of PDADN at the pressure of 0.1 MPa are 134.9 kJ mol−1, 1012.7 s−1 and 1−(1−α)3, respectively; (3) the experimental values of pressure are a principal factor affecting the magnitude of the apparent activation energy; (4) the mechanism of thermal decomposition of PDADN can be expressed by the following scheme: Download full-size image(5) the critical temperature of thermal explosive for PDADN is 423.74 K.

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