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Reaction Model for the Aging and Shelf‐Life Prediction of Double‐Base Propellant SF‐3
Author(s) -
Li Jin,
Tian Tian,
Zhang Guan,
Liu Zongkuan,
Gu Zhaolin,
Niu Jiaxin
Publication year - 2021
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.202100017
Subject(s) - shelf life , accelerated aging , propellant , arrhenius equation , chemistry , kinetics , chemical kinetics , reaction rate , order of reaction , reaction rate constant , activation energy , stabilizer (aeronautics) , analytical chemistry (journal) , thermodynamics , chromatography , organic chemistry , catalysis , physics , food science , quantum mechanics , engineering , mechanical engineering
The prediction and determination of shelf‐life is an important step in the storage and use of ammunition. In this study, the aging reaction model and shelf‐life prediction model of SF‐3 double‐base propellant were studied. First, a theoretical aging reaction model of SF‐3 was developed based on scanning electron microscopy and energy‐dispersive X‐ray spectroscopy analysis and the aging reaction process. The aging reaction model was also experimentally validated. Then, based on the theoretical aging reaction model and the Arrhenius equation, the stabilizer depletion and mass loss kinetics models were developed. The aging reaction model showed a linear relationship between the stabilizer depletion rate x n and the aging time t , which indicated that the aging reaction is a zero‐order reaction. The rate‐limiting step of the SF‐3 aging reaction was the decomposition rate of nitrate ester compounds. The reaction kinetics model showed that the equation to predict the shelf‐life of SF‐3 was t [d]=1.44×10 −13 exp(11428.38/ T [K]). Additionally, the relationship between the mass loss rate x w and storage temperature T was x w [%]=53.93exp(−446.97/ T [K]) at the end of the shelf‐life of SF‐3. The results of this study provide a reference for predicting the aging process of other propellants that use nitrate ester compounds as the main energetic components. It also provides theoretical support for using the mass loss rate to predict the shelf‐life of SF‐3.