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Investigation of Shock-Induced Chemical Decomposition of Sensitized Nitromethane Through Time-Resolved Raman Spectroscopy

Published online by Cambridge University Press:  10 February 2011

G. I. Pangilinan ,
C. P. Constantinou ,
Y. A. Gruzdkov  and
Y. M. Gupta
G. I. Pangilinan
Affiliation:
Shock Dynamics Center and Department of Physics, Washington State University, Pullman, Washington 99164 – 2814
C. P. Constantinou
Affiliation:
Shock Dynamics Center and Department of Physics, Washington State University, Pullman, Washington 99164 – 2814
Y. A. Gruzdkov
Affiliation:
Shock Dynamics Center and Department of Physics, Washington State University, Pullman, Washington 99164 – 2814
Y. M. Gupta
Affiliation:
Shock Dynamics Center and Department of Physics, Washington State University, Pullman, Washington 99164 – 2814
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Abstract

Molecular processes associated with shock induced chemical decomposition of a mixture of nitromethane with ethylenediamine (0.1 wt%)are examined using time-resolved, Raman scattering. When shocked by stepwise loading to 14.2 GPa pressure, changes in the nitromethane vibrational modes and the spectral background characterize the onset of reaction. The CN stretch mode softens and disappears even as the NO2 and CH3 stretch modes, though modified, retain their identities. The shape and intensity of the spectral background also shows changes characteristic of reaction. Changes in the background, which are observed even at lower peak pressures of 11.4 GPa, are assigned to luminescence from reaction intermediates. The implications of these results to various molecular models of sensitization are discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 418: Symposium GG – Decomposition, Combustion, and Detonation Chemistry of Energetic Materials , 1995 , 349
Copyright
Copyright © Materials Research Society 1996

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