Coupling effect on the thermal hazard assessment of hazardous chemical materials via calorimetric technologies and simulation approaches

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外文摘要：The coupling effect of heat absorption and release exists in the thermal decomposition of a few chemical materials.However,the impact of the above coupling on thermal hazard assessment is not considered in the literature studies.In this work,nitroguanidine(NQ)and 1,3,5-trinitro-1,3,5-triazine(RDX)are selected as representative materials to explore the influence of the coupling effect on the thermal hazard assessment of chemical materials.The linear heating experiments of NQ and RDX are carried out by a microcalorimeter and synchronous thermal analyser.The thermal decomposition curves are decoupled by advanced thermokinetics software.The thermal decomposition and kinetic parameters before and after decoupling are calculated.The results of TG experiment show that both NQ and RDX began to lose mass during the endothermic stage.The endothermic melting and exothermic decomposition of NQand RDX are coupled within this stage.The coupling effect has different degrees of influence on its initial decomposition temperature and safety parameters.Compared with the parameters in the coupling state,the initial decomposition temperature and adiabatic induction period after decoupling decrease.The self-accelerating decomposition temperature increases,and internal thermal runaway time decreases.In the thermal hazard assessment of chemical materials with coupling effects,the calculated parameters after decoupling should be taken as an important safety index.

外文关键词：

Calorimetric technologiesKineticsThermal hazardPhase transformationThermal decomposition

作者：

Yabei Xu、Jiankun Shao、Wei Wang、Shengliang Xu、Dongping Chen

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作者单位：

State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China

Science and Technology on Aerospace Chemical Power Laboratory,Hubei Institute of Aerospace Chemotechnology,Xiangyang 441003,China

基金：

project of the Open Research Fund Program of Science and Technology on Aerospace Chemical Power LaboratoryState Key Laboratory of Explosion Science and Technology(Beijing Institute of Technology)

项目编号：

STACPL320221B04ZDKT21-01

出版年：

2024

DOI：

10.1016/j.dt.2023.04.015

防务技术

中国兵工学会

防务技术

CSTPCD

影响因子：0.358

ISSN：2214-9147

年,卷(期)：2024.32(2)

参考文献量56