膨胀聚苯乙烯泡沫热氧化分解动力学研究  

Kinetics of the Thermo-Oxidative Decomposition of Expanded Polystyrene Foam

作　　者：崔嵛[1] 程旭东[1] 龚伦伦[1] 丁延伟[2] 亓延军[1,3] 张和平[1] 

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,合肥230027 [2]中国科学技术大学合肥微尺度物质科学国家实验室,合肥230026 [3]山东消防总队,济南250014

出　　处：《燃烧科学与技术》2011年第6期558-564,共7页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(51036007)

摘　　要：用非等温热重分析方法对膨胀聚苯乙烯泡沫的热氧化分解特性进行了研究.样品在空气气氛下由10,℃/min、20,℃/min、40,℃/min和50,℃/min共4个升温速率从室温加热至800,℃.分别使用积分等转化率方法中的Flynn-Wall-Ozawa(FWO)和Kissinger-Akahir-Sunose(KAS)方法以及基于动力学补偿效应的恒定动力学参数方法(invariant kinetic parameter method,IKP)计算膨胀聚苯乙烯非等温热氧化分解的动力学参数.由等转化率方法得到的结果可认为膨胀聚苯乙烯泡沫在空气气氛下主要为一步反应.FWO方法和KAS方法得到的平均活化能与IKP方法得到的活化能具有较好的一致性.由IKP方法和常用固相反应机理函数在不同升温速率下动力学参数的对应准则可确定膨胀聚苯乙烯泡沫热氧化分解过程可由成核和核生长控制的机理函数(Avrami Eroféev方程)A1.7描述.The thermo-oxidative decomposition of expanded polystyrene foam （EPS） was studied using non-isothermal thermogravimetric analysis at the heating rates of 10 ℃/min, 20 ℃/min, 40 ℃/min and 50 ℃/min under the air atmosphere within the temperature range from room temperature to 800 ℃, respectively. The kinetic parameters were calculated by the isoconversional methods （i.e. Flynn-Wall-Ozawa（FWO）and Kissinger-Akahir-Sunose （KAS）） and the invariant kinetic parameter method （IKP） which is based on the kinetic compensation effect. The re- suits obtained from the isoconversional methods show that the EPS primarily decomposes in a single step. The values of invariam activation energy are in good agreement with those determined by the isoconversional methods. With the aim of determining the kinetic model, the IKP method was associated with the criterion of coincidence of the kinetic parameters of the known solid-state conversion functions for all heating rates. Finally, the nucleation and nuclei growth （Avrami Erofrev equation）A1.7 mechanism was obtained to describe the thermo-oxidative decomposition of EPS.

关 键 词：膨胀聚苯乙烯泡沫 热重分析 热氧化分解动力学 活化能 反应机理函数 

分 类 号：TU532.4[建筑科学—建筑技术科学]