J. Phys. IV France
Volume 05, Numéro C4, Mai 1995
Approches microscopique et macroscopique des détonations
2ème atelier international
Page(s) C4-553 - C4-558
Approches microscopique et macroscopique des détonations
2ème atelier international

J. Phys. IV France 05 (1995) C4-553-C4-558

DOI: 10.1051/jp4:1995444

Microscopic Experimental Approaches to High Pressure Chemistry

T.P. Russell1, T.M. Allen2, J.K. Rice1 and Y.M. Gupta2

1  Naval Research Laboratory, Chemistry Division, Code 6110 Washington, DC 20375-5320, U.S.A.
2  Washington State University, Department of Physics, Shock Dynamics Center, Pullman, WA 99164-2814, U.S.A.

The experimental study of the chemistry related to the deflagration/detonation of energetic materials is extremely challenging due to the high pressure, high temperature, and time domain under which the chemical reactions occur. In addition, non equilibrium pressure and temperature conditions temporally effect the reaction pathways and rates during the reaction process. The multiple phases of material present (i.e. the heterogeneous nature of the problem), the multiple reaction pathways (both in series and in parallel), and the temporal dependency of the physical conditions make the assignments of the early reaction products, product sequence, and reaction mechanism an extremely difficult if not nearly unsolvable problem. Recently, experimental approaches have been developed which permit the spectroscopic identification of products species, reaction sequences, and global reaction rates under simulated detonation conditions. Three experimental techniques : (1) high pressure matrix isolation (2) high pressure time-resolved absorption spectroscopy , and (3) high pressure time-resolved emission spectroscopy are used in conjunction with a gem anvil cell to probe the high pressure chemical processes.

© EDP Sciences 1995