Pyrolysis Empirical Modeling of Polyester Glass Fiber Reinforced Plastics Using Sestak-Berggren Model Method  

作　　者：NAN Wei JI Wenhui YUAN Yanping YUAN Zhongyuan SUN Yong 

机构地区：[1]School of Mechanical Engineering,Southwest Jiaotong University,Chengdu,610031,China [2]CRRC Changchun Railway Vehicles Co.,Ltd,Changchun,130062,China

出　　处：《Journal of Thermal Science》2024年第2期725-738,共14页热科学学报（英文版）

基　　金：funded by the National Natural Science Foundation of China (No.52038009)。

摘　　要：Polyester Glass Fiber Reinforced Plastic(Polyester GFRP),a thermosetting plastic comprised of glass fiber and polyester polymer compounds,is extensively utilized in high-speed trains.Unraveling its pyrolysis mechanism is crucial as it significantly influences the combustion characteristics and fire safety aspects.Currently,kinetic research on polyester GFRP primarily focuses on employing the Coats-Redfern method to derive a theoretical kinetic model.However,the pyrolysis process of polyester GFRP is complex and the aforementioned theoretical model fails to accurately describe the pyrolysis mechanism.Therefore,this study seeks to utilize the Sestak and Berggren(SB) model as a methodological approach to reveal the complex reaction mechanism during the pyrolysis process.Based on thermogravimetric analysis,the entire pyrolysis process of polyester GFRP is divided into two primary stages.Furthermore,model-free methods are employed to ascertain the activation energy and pre-exponential factor.The results show that the fitted empirical models of the two main pyrolysis stages are f(α)=(1-α)^(1.47)[-ln(1-α)]^(1.50) and f(α)=(1-α)^(1.77)[-ln(1-α)]^(1.72),respectively.The predicted results are in good agreement with experimental data under different heating rates,which indicates that the empirical model can sufficiently describe the pyrolysis process of polyester GFRP.

关 键 词：polyester GFRP model-fitting methods empirical models PYROLYSIS 

分 类 号：TQ327.1[化学工程—合成树脂塑料工业]