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Aging Evaluation of Ammonium Perchlorate/Hydroxyl Terminated Polybutadiene-Based Solid Rocket Engine by Reactive Molecular Dynamics Simulation and Thermal Analysis

Authors: R. F. B. Gonçalves, E. N. Iwama, J. A. F. F. Rocco, K. Iha


Propellants based on Hydroxyl Terminated Polybutadiene/Ammonium Perchlorate (HTPB/AP) are the most commonly used in most of the rocket engines used by the Brazilian Armed Forces. This work aimed at the possibility of extending its useful life (currently in 10 years) by performing kinetic-chemical analyzes of its energetic material via Differential Scanning Calorimetry (DSC) and also performing computer simulation of aging process using the software Large-scale Atomic/Molecular Massively Parallel Simulator (LAMMPS). Thermal analysis via DSC was performed in triplicates and in three heating ratios (5 ºC, 10 ºC, and 15 ºC) of rocket motor with 11 years shelf-life, using the Arrhenius equation to obtain its activation energy, using Ozawa and Kissinger kinetic methods, allowing comparison with manufacturing period data (standard motor). In addition, the kinetic parameters of internal pressure of the combustion chamber in 08 rocket engines with 11 years of shelf-life were also acquired, for comparison purposes with the engine start-up data.

Keywords: Thermal analysis, shelf-life, thrust, Ozawa method, Kissinger method, LAMMPS software

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[1] R. V. Binda, ―Estudo dos fatores que influenciam a predição de vida útil de motor-foguete sólido, ‖ Instituto Tecnológico de Aeronáutica, 2015.
[2] E. Kirchhof et al., ―Estimate Of PBX (Plastic-Bonded Explosive) Shelf Life With Accelerated Aging, ‖ Quim. Nova, vol. 39, no. 6, pp. 661–668, 2016.
[3] ASTM E698-11, ―Standard Test Method for Arrhenius Kinetic Constants for Thermally Unstable Materials Using Differential Scanning Calorimetry and the Flynn/Wall/Ozawa Method, ‖ Annu. B. ASTM Stand., vol. i, pp. 1–8, 2005.
[4] R. F. B. Goncalves, J. A. F. F. Rocco, and K. Iha, ―Thermal decomposition kinetics of aged solid propellant based on ammonium perchlorate - AP/HTPB binder, ‖ pp. 325–342, 2013.
[5] G. Agard, ―Structural Assessment of Solid Propellant Grains,‖ in Advisory Group For Aerospace Research & Development, 1997, no. December, p. 212.
[6] N. Kubota, Propellants and Explosives: Thermochemical Aspects of Combustion, 2nd ed. Weinheim, 2002.
[7] J. F. F. Rocco, ―Estudos sobre o envelhecimento de formulações de propelente sólido compósito baseadas em binders poliuretânicos empregadas em motores foguete, ‖ Instituto Tecnológico de Aeronáutica, 2004.
[8] J. de B. Magalhães, ―Estudo sobre envelhecimento acelerado de propelente sólido compósito,‖ Instituto Tecnológico de Aeronáutica, São José dos Campos, 2011.
[9] 4170 STANAG 4170, ―STANAG 4170 (Edition 3) - Principles and Methodology for the Qualification of Explosive Materials for Military Use Explosives, ‖ Brussels, Belgium, 2008.
[10] MIL-STD-1751A, ―Test Method Standard Safety And Performance Tests For The Qualification of Explosives (High Explosives, Propellants, And Pyrotechnics), ‖ no. December, 2001.
[11] T. Ozawa, ―Kinetic analysis of derivative curves in thermal analysis, ‖ J. Therm. Anal., vol. 2, no. 3, pp. 301–324, Sep. 1970.
[12] T. Ozawa, ―Thermal analysis — review and prospect, ‖ Thermochim. Acta, vol. 355, no. 1–2, pp. 35–42, Jul. 2000.
[13] H. E. Kissinger, ―Variation of peak temperature with heating rate in differential thermal analysis, ‖ J. Res. Natl. Bur. Stand. (1934)., vol. 57, no. 4, p. 217, 1956.
[14] H. E. Kissinger, ―Reaction Kinects in Differential Thermal Analysis, ‖ Analytical Chemistry, Washington D.C., pp. 1702–1706, 1957.
[15] H. Shekhar, ―Prediction and comparison of shelf life of solid rocket propellants using arrhenius and berthelot equations, ‖ Propellants, Explos. Pyrotech., vol. 36, no. 4, pp. 356–359, 2011.