A method of estimating the safe storage life (τ), self-accelerating decomposition temperature (TsADT) and critical temperature of thermal explosion (Tb) of double-base propellant using isothermal and non-isothe...A method of estimating the safe storage life (τ), self-accelerating decomposition temperature (TsADT) and critical temperature of thermal explosion (Tb) of double-base propellant using isothermal and non-isothermal decomposition behaviours is presented. For double-base propellant composed of 56±1wt% of nitrocellulose (NC), 27±0.5wt% of nitroglycerine (NG), 8.15±0.15wt% of dinitrotoluene (DNT), 2.5±0.1wt% of methyl centralite, 5.0±0.15wt% of catalyst and 1.0±0.1wt% of other, the values of r of 49.4 years at 40℃, of TSAOT of 151.35℃ and of Tb of 163.01℃ were obtained.展开更多
采用非限定烤燃试验,测定了高固含量改性双基推进剂药柱的热爆炸临界温度,讨论了固含量与临界温度的关系及临界温度的尺度效应;通过高压热分解研究,获得了高固体含量推进剂热分解反应非等温动力学参数,探讨了固含量对临界温度的影响机...采用非限定烤燃试验,测定了高固含量改性双基推进剂药柱的热爆炸临界温度,讨论了固含量与临界温度的关系及临界温度的尺度效应;通过高压热分解研究,获得了高固体含量推进剂热分解反应非等温动力学参数,探讨了固含量对临界温度的影响机理。结果表明,固含量由0%增加至50%,热爆炸临界温度由134.5℃上升到156.1℃,3 MPa压力下第一热分解峰温由201.8℃上升到206.2℃(β=10℃/min),表明热稳定性增加;长径比为1的GLX-4药柱临界温度与直径的对数呈线性关系。此外,随着固含量升高,热分解活化能由161.0 k J/mol升高到181.9 k J/mol,揭示了烤燃试验热获得的爆炸临界温度升高这一现象的高压热分解动力学理论依据。展开更多
基金We are grateful to the National Natural Science Foundation of China (No. 20573098)
文摘A method of estimating the safe storage life (τ), self-accelerating decomposition temperature (TsADT) and critical temperature of thermal explosion (Tb) of double-base propellant using isothermal and non-isothermal decomposition behaviours is presented. For double-base propellant composed of 56±1wt% of nitrocellulose (NC), 27±0.5wt% of nitroglycerine (NG), 8.15±0.15wt% of dinitrotoluene (DNT), 2.5±0.1wt% of methyl centralite, 5.0±0.15wt% of catalyst and 1.0±0.1wt% of other, the values of r of 49.4 years at 40℃, of TSAOT of 151.35℃ and of Tb of 163.01℃ were obtained.
文摘采用非限定烤燃试验,测定了高固含量改性双基推进剂药柱的热爆炸临界温度,讨论了固含量与临界温度的关系及临界温度的尺度效应;通过高压热分解研究,获得了高固体含量推进剂热分解反应非等温动力学参数,探讨了固含量对临界温度的影响机理。结果表明,固含量由0%增加至50%,热爆炸临界温度由134.5℃上升到156.1℃,3 MPa压力下第一热分解峰温由201.8℃上升到206.2℃(β=10℃/min),表明热稳定性增加;长径比为1的GLX-4药柱临界温度与直径的对数呈线性关系。此外,随着固含量升高,热分解活化能由161.0 k J/mol升高到181.9 k J/mol,揭示了烤燃试验热获得的爆炸临界温度升高这一现象的高压热分解动力学理论依据。