Science and Technology of Energetic Materials

Vol.62, No.2 (2001)


A study on the thermal stability of organic azides(*in Japanese)
Mieko Kumasaki, Yuji Wada, Yoshiaki Akutsu, Mitsuru Arai,
and Masmitsu Tamura


Four organic azide compounds (N3 - CH2R, R : CH3, OCH3, COCH3 and CONH2) were synthesized using a new safe method without heat and distillation procedures, and identified from their IR and H NMR spectra.
Then their thermal stabilities were evaluated from TDSC measured with SC - DSC. As a result, the TDSC values for N3 - CH2 - R (R : CH3, OCH3, CONH2, and COCH3) were shown to be 225 ℃, 173 ℃, 157 ℃ and 130 ℃, respectively.
As compared with substituent constants, thermal stabilities were suggested to become low due to electron withdrawing group. The bond lengths of trigger linkaeges were not affected by substituent effects.
Ground states and transition states were optimized for four azide compounds and obtained activation energies. The activation energies increase accompanying an increase in thermal stabilities.

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