29 May 2013 Quantum cascade laser FM spectroscopy of explosives
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Polyisobutylene is an industrial polymer that is widely used in a number of applications including the manufacture of military grade explosives. We have examined the vapor emanating from a series of different molecular weight samples of polyisobutylene using high resolution Quantum Cascade Laser FM spectroscopy. The vapor phase spectra all exhibit a rovibrational structure similar to that for the gas phase isobutylene molecule. We have assigned the structure in the 890 cm-1 and 1380 cm-1 regions to the isobutylene ν28 and ν7 fundamental bands respectively. These spectroscopic signatures may prove useful for infrared sensing applications. Here we will present the infrared signatures along with recent GCMS data from a sample of C4, utilizing solid-phase microextraction vapor collection fibers, which confirm the presence of isobutylene as one of the volatile bouquet species in RDX-based explosives.
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Zach Gutmann, Zach Gutmann, Trocia Clasp, Trocia Clasp, Chris Lue, Chris Lue, Tiffani Johnson, Tiffani Johnson, Taylor Ingle, Taylor Ingle, Janet Jamison, Janet Jamison, Roger Buchanan, Roger Buchanan, Scott Reeve, Scott Reeve, "Quantum cascade laser FM spectroscopy of explosives", Proc. SPIE 8710, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIV, 87100J (29 May 2013); doi: 10.1117/12.2015483; https://doi.org/10.1117/12.2015483

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