| 二苯胺对硝化棉的等温热分解动力学的影响 |
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| 引用本文： | 罗利琼,柴作虎,金波,黄琼,楚士晋,彭汝芳.二苯胺对硝化棉的等温热分解动力学的影响[J].含能材料,2019,27(12):991-997. |
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| 作者姓名： | 罗利琼 柴作虎 金波 黄琼 楚士晋 彭汝芳 |
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| 作者单位： | 西南科技大学 环境友好能源材料国家重点实验室,四川 绵阳,621010 |
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| 基金项目： | 国家自然科学基金 21875192;总装预研领域基金重点项目 6140720020101国家自然科学基金（21875192）和总装预研领域基金重点项目（6140720020101） |
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| 摘 要： | 为研究二苯胺(DPA)对硝化棉(NC)的等温热分解动力学的影响,采用等温热分解量气装置,获得378.15～398.15 K时NC/DPA(3%)混合样品热分解产生气体的压力随时间变化曲线,该曲线中存在明显的拐点。通过Arrhenius方程和模式配合法获得NC/DPA(3%)混合样品在拐点前和拐点后的等温热分解动力学参数。采用Berthelot方程外推得到不同温度下NC/DPA的贮存寿命。结果表明,拐点前NC/DPA(3%)混合样品的活化能为164.6 kJ·mol~(-1),拐点后NC/DPA(3%)混合样品的活化能为150.4 kJ·mol~(-1);与原料NC相比,拐点前NC/DPA(3%)混合样品的活化能提高17.7 kJ·mol~(-1);以分解深度0.1%作为评判标准,室温下NC/DPA(3%)混合样品可贮存18.3年,表明添加3%DPA后可延长NC贮存寿命7.7年。
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| 关 键 词： | 硝化棉 二苯胺(DPA) 等温热分解 动力学 贮存寿命 |
| 收稿时间： | 2019/5/5 0:00:00 |
| 修稿时间： | 2019/8/22 0:00:00 |
Effects of Diphenylamine on Isothermal Thermal Decomposition Kinetics of Nitrocellulose |
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| LUO Li-qiong,CHAI Zuo-hu,JIN Bo,HUANG Qiong,CHU Shi-jin and PENG Ru-fang.Effects of Diphenylamine on Isothermal Thermal Decomposition Kinetics of Nitrocellulose[J].Chinese Journal of Energetic Materials,2019,27(12):991-997. |
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| Authors: | LUO Li-qiong CHAI Zuo-hu JIN Bo HUANG Qiong CHU Shi-jin and PENG Ru-fang |
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| Affiliation: | State Key Laboratory of Environmental-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China,State Key Laboratory of Environmental-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China,State Key Laboratory of Environmental-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China,State Key Laboratory of Environmental-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China,State Key Laboratory of Environmental-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China,State Key Laboratory of Environmental-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China |
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| Abstract: | The influence of diphenylamine (DPA) on the thermal stability of nitrocellulose (NC) was investigated by isothermal decomposition kinetics. Pressure versus time curves of the gas generated by the thermal decomposition of NC/DPA (3%) mixed sample at 378.15-398.15 K were obtained by using the isothermal decomposition gas metering device. There is a visible inflection point in this curve. The thermal decomposition kinetic parameters of NC/DPA (3%) composite were calculated by Arrhenius equation and model-fitting method. The storage life of NC and NC/DPA composite was estimated using Berthelot equation. The results show that the activation energy of NC/DPA (3%) before the inflection point is 164.6 kJ·mol-1, and the activation energy of NC/DPA (3%) mixed sample after the inflection point is 150.4 kJ·mol-1. Compared with the NC raw material, the activation energy of NC/DPA (3%) before the inflection point is increased by 17.7 kJ·mol-1. With a decomposition extent of 0.1% as the criterion, the storage life of NC/DPA (3%) at room temperature is 18.3 years, indicating that the storage life of NC can be extended by 7.7 years after the addition of 3%DPA. |
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| Keywords: | nitrocellulose diphenylamine isothermal thermal decomposition kinetics storage life |
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