Polymer and Materials Science
Wiley InterScience Backfile Collection 1832-2000
Chemistry and Pharmacology
Process Engineering, Biotechnology, Nutrition Technology
Five compositions incorporating octogen with an energetic binder, a reference composition and four compositions containing ammonium perchlorate, were studied experimentally by measuring the detonation velocity versus the diameter, by performing the cylinder test and a frontal projection test using a VISAR interferometer. The results obtained are treated in the frame means of the ZND phenomenological model extended to nonideal explosives and by using an adaptation of Kamlet's method. The conclusions drawn from this study are: - the phenomenological model is in line with the experimental results,- AP is entirely decomposed in the steady-state zone,- the recombination reactions between the oxygen, released by the AP, and the carbon, released by other components, occur completely in the steady-state zone in the case of small grain-size AP (10μm),- these reactions are prolonged, for a few microseconds, in the non steady-state zone in the case of large grain-size AP (200μm),- In this case, the heterogeneity of the material is reflected in the structure of the detonation wave which shows a Von Neumann shock with a finite rise time (30 ns).The methodology developped in this work can be used for the study of the majority of non ideal explosives.
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