TY - JOUR
T1 - Thermal decomposition study of HNIW by synchrotron photoionization mass spectrometry
AU - Dong, Linmao
AU - Li, Xiaodong
AU - Yang, Rongjie
PY - 2011/12
Y1 - 2011/12
N2 - Thermal decomposition of hexanitrohexaazaisowurtzitane (HNIW) was investigated through tuneable vacuum ultraviolet photoionization with molecular-beam sampling mass spectrometry (MBMS). According to photoionization efficiency (PIE) spectroscopic results, the initial decomposition products of HNIW were identified including HCN, CO, NO, HNCO, N 2O, CO 2 (a little), NO 2, C 2H 2N 2, C 3H 3N 3, C 4H 3N 3, C 3H 4N 4, C 5H 4N 4, C 5H 5N 5 and C 6H 6N 6. The possible ionization energies of C 2H 2N 2, C 4H 3N 3, C 3H 4N 4 and C 6H 6N 6 were analyzed on basis of the PIE spectra. The data were compared with those of thermogravimetry-mass spectrometry (TG-MS) and thermogravimetry-Fourier transform-infrared spectroscopy (TG-FT-IR). The kinetic parameters for the formation of HNCO, HCN and CO 2 were calculated from the current curves of species by TG-FT-IR spectroscopy, typically the apparent activation energy (E a) and prefactor (A) for HNCO were E a=161.3±2.5kJ mol -1 and A=38.9±0.6 s -1 with an optimal mechanism function f(α)=(1-α). Global thermal decomposition reaction and Arrhenius equation of HNIW were suggested at the end.
AB - Thermal decomposition of hexanitrohexaazaisowurtzitane (HNIW) was investigated through tuneable vacuum ultraviolet photoionization with molecular-beam sampling mass spectrometry (MBMS). According to photoionization efficiency (PIE) spectroscopic results, the initial decomposition products of HNIW were identified including HCN, CO, NO, HNCO, N 2O, CO 2 (a little), NO 2, C 2H 2N 2, C 3H 3N 3, C 4H 3N 3, C 3H 4N 4, C 5H 4N 4, C 5H 5N 5 and C 6H 6N 6. The possible ionization energies of C 2H 2N 2, C 4H 3N 3, C 3H 4N 4 and C 6H 6N 6 were analyzed on basis of the PIE spectra. The data were compared with those of thermogravimetry-mass spectrometry (TG-MS) and thermogravimetry-Fourier transform-infrared spectroscopy (TG-FT-IR). The kinetic parameters for the formation of HNCO, HCN and CO 2 were calculated from the current curves of species by TG-FT-IR spectroscopy, typically the apparent activation energy (E a) and prefactor (A) for HNCO were E a=161.3±2.5kJ mol -1 and A=38.9±0.6 s -1 with an optimal mechanism function f(α)=(1-α). Global thermal decomposition reaction and Arrhenius equation of HNIW were suggested at the end.
KW - Hexanitrohexaazaisowurtzitane
KW - Molecular-beam Sampling Mass Spectrometry
KW - TG Mass Spectrometry
KW - TG-FT-IR Spectroscopy
KW - Thermal Analysis
UR - http://www.scopus.com/inward/record.url?scp=84455162733&partnerID=8YFLogxK
U2 - 10.1002/prep.201000078
DO - 10.1002/prep.201000078
M3 - Article
AN - SCOPUS:84455162733
SN - 0721-3115
VL - 36
SP - 493
EP - 498
JO - Propellants, Explosives, Pyrotechnics
JF - Propellants, Explosives, Pyrotechnics
IS - 6
ER -
