Advanced kinetic tools for the evaluation of decomposition reactionsDetermination of thermal stability of energetic materials

被引:0
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作者
B. Roduit
Ch. Borgeat
B. Berger
P. Folly
B. Alonso
J. N. Aebischer
F. Stoessel
机构
[1] Advanced Kinetics and Technology Solutions AKTS AG,
[2] TECHNO-Pôle,undefined
[3] Advanced Kinetics and Technology Solutions AKTS AG,undefined
[4] TECHNO-Pôle,undefined
[5] armasuisse,undefined
[6] Science and Technology Centre,undefined
[7] armasuisse,undefined
[8] Science and Technology Centre,undefined
[9] University of Applied Sciences of Western Switzerland,undefined
[10] University of Applied Sciences of Western Switzerland,undefined
[11] Swiss Institute for the Promotion of Safety and Security (SWISSI),undefined
关键词
ageing; energetic materials; decomposition kinetics; thermal hazards; time to maximum rate; TMRad; pyrotechnic ignition; runaway reactions;
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学科分类号
摘要
An advanced kinetic study on the thermal behaviour of pyrotechnic ignition mixtures has been carried out by differential scanning calorimetry using different B/KNO3 mixtures (50:50, 30:70, 20:80) as a model reaction. The experimental conditions applied (isochoric conditions/closed crucibles and isobaric conditions/open crucibles) as well as the composition of the mixtures noticeably influences the relative thermal stabilities of the energetic materials. The kinetic study focused on the prediction of the thermal stability of the different mixtures both in extended temperature ranges and under temperature conditions at which ordinary investigation would be very difficult. Using advanced numerical tools [1], thermal ageing and influence of the complex thermal environment on the heat accumulation conditions were computed. This can be done for any surrounding temperature profile such as isothermal, non-isothermal, stepwise, modulated, shock, adiabatic conditions and additionally for temperature profiles reflecting real atmospheric temperature changes (yearly temperature profiles of different climates with daily minimal and maximal fluctuations). Applications of accurate decomposition kinetics enabled the determination of the time to maximum rate under adiabatic conditions (TMRad) with a precision given by the confidence interval of the predictions. This analysis can then be applied for the examination of the effects of the surrounding temperature for safe storage or transportation conditions (e.g. determination of the safe transport or storage temperatures).
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页码:229 / 236
页数:7
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