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2 Central European Journal of Energetic Materials

2 2011

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UV-VIS and FTIR Investigations of Long-Term Aged Explosives. Part 1

Shishkov P., Nedkova M., Atanasova P.

Central European Journal of Energetic Materials

2011

Vol. 8, nr 4

293-301

An investigation of TD-50 and tetryl samples obtained by dismantling of weapons, made in 1961 in Bulgaria, was carried out. The weapons were stored in non-heated military stores and the explosives were aged in this time (50 years). The results from UV-VIS and FTIR spectroscopy showed the formation of H-bonds in the solutions and in the investigated materials. The most available properties for determination of H-bond formation from UV-VIS spectra were: the shift, (Δ λ); ratio shift/dilution, (Δ λ /C1/Cn, nm, and Δ λ/Δ C, nm.ml/mg) in acetone solutions and only the shift, (Δ λ) in toluene solutions. The results from FTIR spectroscopy showed that the most available for determination of H-bond formation were: absorbances of some maxima for -NO2 groups, divided from maxima for -CH2 at 917 and 715 cm-1 like internal standards and some values of Δh*1/2.

UV-VIS and FTIR Investigations of Long-Term Aged Explosives. Part 2

Shishkov P., Nedkova M., Atanasova P., Glavchev I.

Central European Journal of Energetic Materials

2011

Vol. 8, nr 4

303-310

Samples of long-term aged TD-50 and tetryl were investigated by UV-VIS and FTIR spectroscopy and bands of products of ageing were obtained. A complicated maximum of nitro groups at 1537 cm-1 in the FTIR spectra of long-term aged explosives was obtained, like in the IR spectra of long-term aged single-based propellants. Ageing process was confirmed by the presence of several maxima in UV-VIS and FTIR spectra of aged products and determination of several characteristics of the investigated explosives (shifts Δ ν, differences in absorbances ΔA, differences in values of Δh*1/2). Ageing was connected with decrease of H-bond formation on the base of decrease of content of oxygen and nitro groups in TD-50 and tetryl.