硝胺改性双基推进剂的热解特性和分段动力学分析
Pyrolysis Characteristics and Piecewise Thermokinetics ofNitramineModified Double-base Propellant
为研究硝胺改性双基推进剂（RDX-CMDB）的热分解特征，获得其热分解其机理，利用差示扫描量热仪(DSC)对样品的热分解过程进行动态及等温测试。动态DSC显示RDX-CMDB的热分解存在两个耦合的放热峰，其峰温分别为181.6-207.0℃和196.9-227.3℃之间，总的分解热-ΔHr约为3733.5 J?g-1。等温DSC显示第一个放热峰为减速型，第二个峰则具有自催化分解的特征。在此基础上，采用国际热分析和量热协会（ICTAC）推荐的无模型法及机理函数筛选方法，对两段放热的动力学和机理函数进行了分析和验证，得到两段的动力学表达式分别为f(α1)=2(1-α1)^1/2, (α1=2α)和f(α2)=α2^1.08*(1-α2)^1.7, (α2=2α-1, )其机理函数类型与等温DSC结果一致。
he thermal stability and decomposition of nitramine modified double base propellant （RDX-CMDB）was investigated under dynamic and isothermal conditions using differential scanning calorimetry (DSC). There were two continuous exothermic stages in the DSC curve, the two peak temperatures Tp were 181.6-207.0 ℃ and 196.9-227.3 ℃, the decomposition enthalpy ΔHr was about 3733.5 J?g-1. It was found that nth order reaction model was suitable for the first step and autocatalytic teaction was suitable for the second step under the condition of seal DSC ecperiemt. An identification method based on a numerical simulation technique from the ICTAC method was used to determine the characteristic parameters of the decomposition reaction, the kinetic equations of the two steps can be expressed as f(α1)=2(1-α1)^1/2, (α1=2α) and f(α2)=α2^1.08*(1-α2)^1.7,α2=2α-1. The calculated data agreed will with the experiment data.
饶国宁、陈利平、彭金华、陈网桦、吴小娟、王江宁
弹药、引信、火工品爆炸物工业
热安全改性双基推进剂非等温反应动力学无模型法机理函数
thermal-safetyModified double-base propellantnon-isothermal kineticnon-model predictionmechanism function
饶国宁,陈利平,彭金华,陈网桦,吴小娟,王江宁.硝胺改性双基推进剂的热解特性和分段动力学分析[EB/OL].(2015-12-25)[2025-08-16].http://www.paper.edu.cn/releasepaper/content/201512-1269.点此复制
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