ESTIMATION OF SAFE LIFE IN DOUBLE BASE PROPELLANT BY BERGMAN JUNK AND HPLC METHODS AND COMPARISON OF KINETIC MODELS FOR THE CONSUMPTION OF STABILIZER

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DARBANI GH.; AFSHANI M.E.; ABOU ALFATHI H.; PAKZAD M.A.; REZAZADEH GH.H.; BEYGI MOGHADAM A.R.

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Journal: JOURNAL OF ENERGETIC MATERIALS Year:2009 | Volume:3 | Issue:2 Page(s): 27-40

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Title

ESTIMATION OF SAFE LIFE IN DOUBLE BASE PROPELLANT BY BERGMAN JUNK AND HPLC METHODS AND COMPARISON OF KINETIC MODELS FOR THE CONSUMPTION OF STABILIZER

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Keywords

SOLID PROPELLANTQ3

STABILIZERQ4

SAFE LIFEQ4

BERGMAN JUNKQ4

HIGH PERFORMANCE LIQUID CHROMATOGRAPHYQ4

KINETICQ4

Abstract

In this paper, chemical SAFE LIFE of double base SOLID PROPELLANTs with two kinds of STABILIZERs, i.e. Acardite II and Centralite I, was investigated by BERGMAN JUNK and HIGH PERFORMANCE LIQUID CHROMATOGRAPHY(HPLC) methods at normal storage temperature (e.g. 40°C). Then the rate of STABILIZER consumption was considered. In the BERGMAN JUNK method, a certain amount of propellant was aged at different temperatures between 90-120°C and graphs of the volume of evolved gases versus aging time were drawn. Then auto catalytic point was assigned from this curves and the graph of heating temperature against the time of auto catalytic point was plotted. By extrapolation of the obtained straight line up to normal storage temperature, SAFE LIFE of the propellant was predicted. In the HPLC method, propellant was sampled from aged specimen at BERGMAN JUNK method and several new samples which were aged at different temperatures between 65.5-120°C and the amount of remaining STABILIZERs were determined after soxhlet extraction by dichloromethane. Diagrams of STABILIZERs depletion in SOLID PROPELLANT versus aging time were drawn at different temperatures and the time at which STABILIZER content approached zero (auto catalytic point) was determined. It is to note that the rate of depletion of Acardite II is faster than Centralite I, thus, calculation of chemical SAFE LIFE of the double base SOLID PROPELLANT was accomplished on the basis of HPLC data obtained from Acardite II, and SAFE LIFE of propellant was calculated by Berthelot's equation. KINETIC of STABILIZER depletion in propellant was considered as Zero, first order and also shifting order reaction and suitable KINETIC model for consumption of STABILIZER at high and low temperature was suggested. Using shifting order KINETIC, the time of auto catalytic point was calculated and compared with experimental time of auto catalytic point.

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APA: Copy

DARBANI, GH., AFSHANI, M.E., ABOU ALFATHI, H., PAKZAD, M.A., REZAZADEH, GH.H., & BEYGI MOGHADAM, A.R.. (2009). ESTIMATION OF SAFE LIFE IN DOUBLE BASE PROPELLANT BY BERGMAN JUNK AND HPLC METHODS AND COMPARISON OF KINETIC MODELS FOR THE CONSUMPTION OF STABILIZER. JOURNAL OF ENERGETIC MATERIALS, 3(2), 27-40. SID. https://sid.ir/paper/115412/en

Vancouver: Copy

DARBANI GH., AFSHANI M.E., ABOU ALFATHI H., PAKZAD M.A., REZAZADEH GH.H., BEYGI MOGHADAM A.R.. ESTIMATION OF SAFE LIFE IN DOUBLE BASE PROPELLANT BY BERGMAN JUNK AND HPLC METHODS AND COMPARISON OF KINETIC MODELS FOR THE CONSUMPTION OF STABILIZER. JOURNAL OF ENERGETIC MATERIALS[Internet]. 2009;3(2):27-40. Available from: https://sid.ir/paper/115412/en

IEEE: Copy

GH. DARBANI, M.E. AFSHANI, H. ABOU ALFATHI, M.A. PAKZAD, GH.H. REZAZADEH, and A.R. BEYGI MOGHADAM, “ESTIMATION OF SAFE LIFE IN DOUBLE BASE PROPELLANT BY BERGMAN JUNK AND HPLC METHODS AND COMPARISON OF KINETIC MODELS FOR THE CONSUMPTION OF STABILIZER,” JOURNAL OF ENERGETIC MATERIALS, vol. 3, no. 2, pp. 27–40, 2009, [Online]. Available: https://sid.ir/paper/115412/en

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