CAJ | 학술논문

针对既有聚苯乙烯泡沫类外墙外保温系统的防火问题,在空气和氮气气氛下对非阻燃和阻燃型膨胀聚苯乙烯泡沫进行了热重分析。样品由10℃/min、20℃/min、40℃/min和50℃/min四个升温速率从室温加热至800℃。热分解动力学参数由Flynn-Wall-Ozawa（FWO）等转化率方法和多参数非线性回归方法（multivariate non-linear re-gression method）计算,结果表明六溴环十二烷（HBCD）阻燃剂可一定程度上提高EPS的热稳定性。EPS在空气和氮气气氛下热解可认为是单步反应。非阻燃聚苯乙烯泡沫在空气和氮气气氛下的热解过程可由自催化n阶反应机理描述。阻燃EPS在空气气氛下的热解机理为自催化n阶反应,在氮气气氛下则为n阶反应机理。基于动力学参数和反应机理,对聚苯乙烯泡沫在不同温度下的寿命进行了预测。
침대기유취분을희포말류외장외보온계통적방화문제,재공기화담기기분하대비조연화조연형팽창취분을희포말진행료열중분석。양품유10℃/min、20℃/min、40℃/min화50℃/min사개승온속솔종실온가열지800℃。열분해동역학삼수유Flynn-Wall-Ozawa（FWO）등전화솔방법화다삼수비선성회귀방법（multivariate non-linear re-gression method）계산,결과표명륙추배십이완（HBCD）조연제가일정정도상제고EPS적열은정성。EPS재공기화담기기분하열해가인위시단보반응。비조연취분을희포말재공기화담기기분하적열해과정가유자최화n계반응궤리묘술。조연EPS재공기기분하적열해궤리위자최화n계반응,재담기기분하칙위n계반응궤리。기우동역학삼수화반응궤리,대취분을희포말재불동온도하적수명진행료예측。
Concerning the fire protection problems of existing polystyrene foam exterior wall insulation systems, the thermo- gravimetric studies on the commercial grade non-retardant and retardant expanded polystyrene foam (EPS) were carried )ut un- der air and nitrogen atmosphere from ambient temperature to 800℃ at heating rates of 10℃/min, 20℃/min, 40℃/min and 50℃/min. The dependence of the activation energy on the conversion degree was evaluated by using the isoconversional meth- ods (FWO method). The multivariate non-linear regression method was applied for investigation of the kinetic model and the corresponding kinetic parameters. The obtained kinetics parameters reveal that the hexahromocyclododecane (HBCD) flame re- tardant can enhance the thermal stability of EPS. It can be conclude that the decomposition processes of EPS undergo a single step reaction in both air and nitrogen atmosphere. The decomposition of non-retardant EPS under air and nitrogen atmosphere can be described by nth-order reaction with autoeatalysis (Cn) kinetic model. For the retardant EPS, the decomposition process can be accurately describe by the Cn and Fn (nth-order reaction) kinetic model under air and nitrogen atmosphere, respectively. Based on the kinetics parameters and the kinetic models, the lifetime of EPS at different temperatures was predicted.