engleski

Relative explosive strength of some explosive mixtures containing urea and/or peroxides

Several mixtures based on urea derivatives and some inorganic oxidants, including alumina, were studied by means of ballistic mortar techniques with TNT as the reference standard. The detonation pressure (P), detonation velocity (D), detonation heat (Q), and volume of gaseous products at standard temperature and pressure (STP), V, were calculated using EXPLO54 V6.03 thermochemical code. The performance of the mixture4s studied was discussed in relation to their thermal reactivity, determined by means of differential thermal analysis (DTA). It is shown that the presence of hydrogen peroxide in the form of its complex with urea (i.e. UHP) has positive influence on the explosive strength of the corresponding mixtures which is linked to the hydroxy-radical formation in the mixtures during their initiation reaction. These radical might initiate (at least partially) powdered aluminium into oxidation in the CJ plane. Mixtures containing UHP and magnesium are dangerous because of potential auto-ignition.

Ballistic mortar ; TNT ; DTA ; peroxides ; perchlorates ; nitrates ; urea

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