THERMAL STABILITY OF SUBSTITUTED AZIDE COMPOUNDS

摘要

To investigate the substituent effects on the thermal stabilities of energetic materials, the thermal stabilities of four organie substituted azide compounds were evaluated. The azide compounds were prepared using newly devised safe methods which do not include heating. In order to evaluate the thermal stabilities, a sealed cell-differential scanning calorimeter (SC-DSC) was used. The DSC- measurements revealed that the thermal stabilities of the organic azide compounds changed based on the substituent. The order of stability is as follows: methyl group>methoxy group>amide group>aeetyl group. This result indicates that substituent changes in energetic materials have a significant effect on the thermal stabilities. The substituent effects are thought to originate from sterie and electronic effects. By comparing the result with the substituent constants and electronegativities, it was suggested that the thermal stability was affected more by the field effect than the inductive effect.