An Application of Thin Layer Chromatography Combined with Optical Densitometry to Quantitative Analysis of Diphenylamine and Its Initial Daughter Reaction Products in Single-Base Propellants Aged under Natural Conditions

• Autorzy: Miszczak M.
• Języki publikacji: EN

Abstrakty

EN

Thin Layer Chromatography (TLC) was used for the quantitative measurement of the composition of stabilizers used to retard chemical decomposition of single-base (SB) propellants i.e. diphenylamine (DPA), and its initial reaction products due to natural ageing of these propellants under natural (ambient) conditions with test results and certain observations in this matter, are presented. The quantitative determination of DPA and its reaction products was possible by a combination of TLC with the densitometric spectrophotometry technique in the UV detection region. The crucial stage of TLC analytical quantitations was complete extraction of the substances to be analysed from SB propellants nitrocellulose (NC), which was done by rapid dissolution of the SB propellant samples followed by dilution of the solutions obtained to such degree as to make possible TLC separation of the substances to be analysed from the NC "matrix" in which they are "trapped" when the solution is too viscous. Initial chemical changes of DPA in SB propellants resulting in the appearance of DPA initial daughter reaction products such as N-nitroso-DPA, 2-nitro-DPA and 4-nitro-DPA, gave important information on the natural ageing of these homogeneous propellants starting from their very short storage period (some days, weeks or months just after their manufacture) up to long storage lasting even 50 years.

Słowa kluczowe

EN

TLC; optical densitometry; SB propellants; DPA; natural ageing

• Wydawca: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
• Czasopismo: Central European Journal of Energetic Materials
• Rocznik: 2011
• Tom: Vol. 8, nr 2
• Strony: 107--116
• Opis fizyczny: Bibliogr. 10 poz.

Twórcy

autor

Miszczak M.

• Military Institute of Armament Technology, 7 Wyszyńskiego St., 05-220 Zielonka, Poland,

Bibliografia

• [1] Polish Standard PN-C-86201, Nitrocellulose-based Propellants. Determination of Diphenylamine Content, Polish Committee for Standardisation, Warsaw, 1997.
• [2] Miszczak M., Parulska M., Oznaczanie stabilizatorów i ich niektórych nitropochodnych w wybuchowych materiałach miotających za pomocą izokratycznej, wysokosprawnej chromatografii cieczowej, Biuletyn Wojskowej Akademii Technicznej, 1988, 1, 63-70.
• [3] Miszczak M., Badanie chemicznych przemian stabilizatorów w materiałach miotających, Biuletyn Wojskowej Akademii Technicznej 1992, 4, 31-45.
• [4] Miszczak M., Błądek J., Chemical Stability Investigations of Propellants under Conditions of Accelerated and Natural Aging, 9th International Symposium on Chemical Problems Connected with Stability of Explosives, Sundbyberg, Sweden, Proceedings of Symposium, 1993, pp. 233-246.
• [5] Miszczak M., Błądek J., Quantitative Measurement of Propellant Stabilizers with TLC and Liquid-Crystalline Method of Visualization, Propellants, Explos., Pyrotech., 1993, 18, 29.
• [6] Miszczak M., Błądek J., Testing the Chemical Stability of Smokeless Propellants, Chem. Anal. (Warsaw), 1993, 38, 813.
• [7] Miszczak M., Błądek J., Application of Liquid-crystalline Detectors to the Quantitation of Propellants’ Stabilizers by Thin Layer Chromatography, Chem. Anal. (Warsaw), 38, 339.
• [8] Miszczak M., Błądek J., Witkiewicz Z., A Method for Quantitative Chemical Determination of Organic Components in Smokeless Propellants, Polish Patent P.167935, 1995, Military Institute of Armament Technology, Poland.
• [9] Polish Standard PN-C-86202, Smokeless Propellants. Test Methods on Chemical Stability, Polish Committee for Standardisation, Warsaw, 1998.
• [10] Urbański T., Chemistry and Technology of Explosives, Pergamon Press, Oxford, London, New York, Paris, Frankfurt, 1965, vol. II, p. 307.