TY - JOUR
T1 - Thermal research on the melt⁃cast explosive of 3-azido-1,3-dinitroazetidine (ADNAZ)
AU - Zhou, Jing
AU - Zhang, Junlin
AU - Jia, Siyuan
AU - Wang, Bozhou
AU - Qiu, Lili
AU - Meng, Zihui
AU - Pan, Qing
N1 - Publisher Copyright:
© 2023, Akadémiai Kiadó, Budapest, Hungary.
PY - 2023/8
Y1 - 2023/8
N2 - The systematical thermal behaviors of 3⁃azido⁃1,3⁃dinitroazetidine (ADNAZ) was investigated in this research and compared with those of 1,3,3-trinitroazetidine (TNAZ). The results showed that ADNAZ has a low melting temperature at 78 °C. The final mass loss of ADNAZ under atmospheric pressure is 88.2%. Compared to TNAZ, the replacement of gem-dinitro group with gemazidonitro group makes greatly reduce vapor pressure, melting point as well as the thermal decomposition temperature. The in-situ FTIR spectroscopy of ADNAZ proved the strength of nitro group decreases faster than that of azide group, and a carbonyl group (C=O) was formed at the quaternary carbon center on the azetidine skeleton during heating process. TG/DSC–FTIR–MS quadruple technology was applied, finding small molecular fragments from ADNAZ’s thermolysis includes H2 (m/z = 2), H2O (m/z = 18), CN (m/z = 26), HCN (m/z = 27), N2 (m/z = 28), NO (m/z = 30), C2H2O (m/z = 42), HN3 (m/z = 43), CO2 (m/z = 44), and NO2 (m/z = 46). A detailed decomposition mechanism was proposed based on the experimental results.
AB - The systematical thermal behaviors of 3⁃azido⁃1,3⁃dinitroazetidine (ADNAZ) was investigated in this research and compared with those of 1,3,3-trinitroazetidine (TNAZ). The results showed that ADNAZ has a low melting temperature at 78 °C. The final mass loss of ADNAZ under atmospheric pressure is 88.2%. Compared to TNAZ, the replacement of gem-dinitro group with gemazidonitro group makes greatly reduce vapor pressure, melting point as well as the thermal decomposition temperature. The in-situ FTIR spectroscopy of ADNAZ proved the strength of nitro group decreases faster than that of azide group, and a carbonyl group (C=O) was formed at the quaternary carbon center on the azetidine skeleton during heating process. TG/DSC–FTIR–MS quadruple technology was applied, finding small molecular fragments from ADNAZ’s thermolysis includes H2 (m/z = 2), H2O (m/z = 18), CN (m/z = 26), HCN (m/z = 27), N2 (m/z = 28), NO (m/z = 30), C2H2O (m/z = 42), HN3 (m/z = 43), CO2 (m/z = 44), and NO2 (m/z = 46). A detailed decomposition mechanism was proposed based on the experimental results.
KW - Decomposition mechanism
KW - Gemazidonitro explosophoric group
KW - Melt-cast explosive
KW - TG/DSC–MS–FTIR quadruple technology
KW - Thermal research
UR - http://www.scopus.com/inward/record.url?scp=85159691997&partnerID=8YFLogxK
U2 - 10.1007/s10973-023-12246-6
DO - 10.1007/s10973-023-12246-6
M3 - Article
AN - SCOPUS:85159691997
SN - 1388-6150
VL - 148
SP - 7661
EP - 7668
JO - Journal of Thermal Analysis and Calorimetry
JF - Journal of Thermal Analysis and Calorimetry
IS - 15
ER -