Abstract
Results of studying thermal decomposition of ammonium perchlorate (AP) samples in the original form and after irradiation by γ-quanta of 60Co by methods of differential scanning calorimetry and dynamic thermogravimetry with heating rates b = 0.1–0.3 K/sec are described. Irradiation is performed in air at a temperature of 298 ± 2 K and a dose rate of ≈0.2 Gy/sec in the range of absorbed doses D = 0–150 kGy. Preliminary irradiation is demonstrated to lead to substantial transformations of the pattern of thermal decomposition of ammonium perchlorate in the dynamic regime of heating: the single-stage process of decomposition of non-irradiated samples proceeding at b = 0.107 K/sec in the temperature range of 625 to 743 K is replaced by a multistage process. At D = 150 kGy, exothermal transformations accompanied by noticeable losses of sample mass are observed starting from 473 K. Within experimental errors, the total thermal effect of AP decomposition is found to be independent of the absorbed dose and amounts to −1150 kJ/kg on the average.
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References
B. P. Zhukov (ed.), Condensed Energetic Systems. Brief Encyclopedic Dictionary [in Russian], Yanus-K, Moscow (1999).
G. B. Manelis, G. M. Nazin, Yu. I. Rubtsov, and V. A. Strunin, Thermal Decomposition and Combustion of Powders and Explosives [in Russian], Nauka (1996).
L. P. Smirnov, “Chemical physics of decomposition of energetic materials. Problems and prospects,” Usp. Khim., 73, No. 11, 1210–1232 (2004).
E. S. Kim, H. S. Lee, C. F. Mallery, and S. T. Thynell, “Thermal decomposition studies of energetic materials using confined rapid thermolysis/FTIR spectroscopy,” Combust. Flame, 110, 239–255 (1997).
L. P. Orlenko (ed.), Physics of Explosion [in Russian], Vol. 1, Fizmatlit, Moscow (2002).
V. A. Berstein and V. M. Egorov, Differential Scanning Calorimetry in Polymer Physics and Chemistry [in Russian], Khimiya, Leningrad (1990).
W. W. Wendlandt, Thermal Methods of Analysis, Wiley, New York (1974).
A. A. Koptelov, “A calorimetric method for studying radiation-chemical processes in condensed media,” Instrum. Exp. Tech., 46, No. 3, 430–433 (2003).
Encyclopedia of Explosives and Related Items, Vol. 9, US Army Armament Research and Development Command, Large Caliber Weapon Systems Laboratory, Dover (1980).
A. A. Koptelov, S. V. Karyazov, and Yu. M. Milekhin, “Thermal effects in γ-irradiated elastomers,” Dokl. Chem., 397, Part 2, 168–172 (2004).
E. L. Simmons and W. W. Wendlandt, “Non-isothermal rate equations,” Thermochim. Acta, 3, No. 6, 498–502 (1972).
G. D. Sammons, “Dynamic calorimetric solid propellant. Combustion studies,” AIAA Paper No. 69-504 (1969).
P. W. M. Jackobs and H. M. Whitehead, “Decomposition and combustion of ammonium perchlorate,” Chem. Rev., 69, 551–590 (1969).
O. F. Shlenskii, N. V. Afanas’ev, and A. G. Shashkov, Thermal Destruction of Materials. Polymers and Composites under Intense Heating [in Russian], Énergoatomizdat, Moscow (1996).
B. N. Oleinik, Precise Calorimetry [in Russian], Izd. Standartov, Moscow (1973).
V. V. Barzykin, “Thermal explosion under linear heating,” Combust., Expl., Shock Waves, 9, No. 1, 29–42 (1973).
A. A. Koptelov, Yu. M. Milekhin, and D. N. Sadovnichii, “Effect of γ radiation on the character of thermal decomposition of cyclotetramethylenetetranitroamine,” in: Proc. XI Russian Conf. on Thermophysical Properties of Substances [in Russian], Vol. 1, St. Petersburg (2005), p. 76.
V. A. Kireev, Methods of Practical Calculations in Thermodynamics of Chemical Reactions [in Russian], Khimiya, Moscow (1975).
B. V. Orlov and G. Yu. Mazing, Thermodynamic and Ballistic Basis for Design of Solid-Propellant Rocket Engines [in Russian], Mashinostroenie, Moscow (1968).
A. A. Koptelov, S. V. Karyazov, and O. F. Shlenskii, “The kinetics of crystallization of poly(tetrafluoroethylene) by the action of γ radiation,” High Ener. Chem., 37, No. 3, 151–156 (2003).
E. S. Watson, M. J. O’Neill, J. Justin, and N. Brenner, “A differential scanning calorimeter for quantitative differential thermal analysis,” Anal. Chem., 36, No. 7, 1233–1240 (1964).
A. A. Koptelov and Yu. V. Zelenev, “Determination of kinetic parameters of thermal processes in decomposing thermal-protection materials,” Izv. Vyssh. Uchebn. Zaved., Khim. Khim. Tekhnol., 46, No. 3, 55–57 (2003).
K. Kishore, “Study of solid state kinetics by differential scanning calorimetry,” Anal. Chem., 50, No. 8, 1079–1083 (1978).
A. K. Burnham and R. K. Weese, “Thermal decomposition of HMX,” in: Proc. of 36th Int. Annu. Conf. of ICT., Karlsruhe, June 28–July 1 (2005), pp. 152.1–152.12.
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Translated from Fizika Goreniya i Vzryva, Vol. 43, No. 6, pp. 69–74, November–December, 2007.
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Koptelov, A.A., Milekhin, Y.M. Specific features of thermal decomposition of ammonium perchlorate subjected to γ radiation. Combust Explos Shock Waves 43, 682–687 (2007). https://doi.org/10.1007/s10573-007-0091-5
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DOI: https://doi.org/10.1007/s10573-007-0091-5