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Title: Laboratory-scale Investigation of the Influence of Ageing on the Performance and Sensitivity of an Explosive Containing ϵ-CL-20

Abstract

Here, the performance and sensitivity of aged composite explosives based on the epsilon polymorph of hexanitrohexaazaisowurtzitane (ϵ–CL–20) have been evaluated with the laser–induced air shock from energetic materials (LASEM) technique using only milligram quantities of material. The LASEM results demonstrated reduced explosive performance (i.e., lower estimated detonation velocities) and higher sensitivity to ignition with increasing ageing. Chemical analysis of the explosive formulation subjected to ambient and accelerated aging was conducted to help understand the LASEM results. The Fourier Transform Infrared (FTIR) spectra revealed no evidence for conversion to lower–energy polymorphs. Based on the desorption gas chromatography/mass spectrometry (D–GC/MS) results, the observed decrease in performance and increase in sensitivity for the explosive powder aged at 100 °C (relative to ambient and 70 °C aging) have been attributed to changes related to solvent inclusions in the molding powders.

Authors:
 [1];  [1];  [2];  [2]
  1. US Army Research Lab., Aberdeen Proving Ground, MD (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1464197
Report Number(s):
SAND-2018-8194J
Journal ID: ISSN 0721-3115; 666398
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Propellants, Explosives, Pyrotechnics
Additional Journal Information:
Journal Volume: 43; Journal Issue: 6; Journal ID: ISSN 0721-3115
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; CL-20; detonation performance; aged energetic materials; laser-induced plasma; laser-induced shock velocity; deflagration

Citation Formats

Gottfried, Jennifer L., Pesce-Rodriguez, Rose A., Farrow, Darcie, and Dellinger, Jennifer. Laboratory-scale Investigation of the Influence of Ageing on the Performance and Sensitivity of an Explosive Containing ϵ-CL-20. United States: N. p., 2018. Web. doi:10.1002/prep.201800042.
Gottfried, Jennifer L., Pesce-Rodriguez, Rose A., Farrow, Darcie, & Dellinger, Jennifer. Laboratory-scale Investigation of the Influence of Ageing on the Performance and Sensitivity of an Explosive Containing ϵ-CL-20. United States. doi:10.1002/prep.201800042.
Gottfried, Jennifer L., Pesce-Rodriguez, Rose A., Farrow, Darcie, and Dellinger, Jennifer. Tue . "Laboratory-scale Investigation of the Influence of Ageing on the Performance and Sensitivity of an Explosive Containing ϵ-CL-20". United States. doi:10.1002/prep.201800042. https://www.osti.gov/servlets/purl/1464197.
@article{osti_1464197,
title = {Laboratory-scale Investigation of the Influence of Ageing on the Performance and Sensitivity of an Explosive Containing ϵ-CL-20},
author = {Gottfried, Jennifer L. and Pesce-Rodriguez, Rose A. and Farrow, Darcie and Dellinger, Jennifer},
abstractNote = {Here, the performance and sensitivity of aged composite explosives based on the epsilon polymorph of hexanitrohexaazaisowurtzitane (ϵ–CL–20) have been evaluated with the laser–induced air shock from energetic materials (LASEM) technique using only milligram quantities of material. The LASEM results demonstrated reduced explosive performance (i.e., lower estimated detonation velocities) and higher sensitivity to ignition with increasing ageing. Chemical analysis of the explosive formulation subjected to ambient and accelerated aging was conducted to help understand the LASEM results. The Fourier Transform Infrared (FTIR) spectra revealed no evidence for conversion to lower–energy polymorphs. Based on the desorption gas chromatography/mass spectrometry (D–GC/MS) results, the observed decrease in performance and increase in sensitivity for the explosive powder aged at 100 °C (relative to ambient and 70 °C aging) have been attributed to changes related to solvent inclusions in the molding powders.},
doi = {10.1002/prep.201800042},
journal = {Propellants, Explosives, Pyrotechnics},
number = 6,
volume = 43,
place = {United States},
year = {2018},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Figure 1 Figure 1: Emission spectra from the laser excitation of pure a) ε-CL-20 and b) (β-CL-20, c) the RSI-007 baseline material aged at room temperature, the two RSI-007 samples aged at d) 70 or e) 100°C, and f) the blank tape substrate.

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