聚氯乙烯材料的燃烧特性研究
Study on Combustion Characteristics of PVC Materials
毛青龙 1朱鹏 1赵彦丽 1包任烈2
作者信息
- 1. 上海应用技术大学城市建设与安全工程学院,上海 201418
- 2. 应急管理部上海消防研究所,上海 200438
- 折叠
摘要
为深入了解聚氯乙烯(PVC)材料火灾时的燃烧行为,文章采用热红联用及锥形量热仪技术对其燃烧特性进行研究,用Kissinger方法和Friedman方法对热解燃烧过程的活化能进行计算.热红联用结果表明:温度区间205～405℃和369～650℃分别为材料的热解和氧化燃烧阶段,两阶段均存在显著失重及明显放热,升温速率增加会使区间向高温区移动.热解阶段的主要产物为氯化氢和氯代烃,同时还有少量烷烃,氧化燃烧阶段主要产物为CO2,同时还有少量氯化氢、氯代烃、烷烃、芳香族化合物以及羟基化合物.锥形量热仪测试结果表明:PVC点燃后热释放速率、产烟速率以及CO和CO2生成量均迅速增加至峰值,然后再逐步下降,且热辐射强度增加会使峰值增大,达峰时间缩短.另外,热辐射强度增加还显著缩短点燃时间,加快质量损失速率,并增加质量损失率.
Abstract
To deepen the understanding of the combustion behavior of polyvinyl chloride(PVC)material during fire incidents,thermogravimetric infrared spectroscopy(TG-FTIR)and cone calorimetry techniques were utilized in this study to investigate its burning characteristics.The Kissinger and Friedman methods were employed to calculate the activation energy of the pyrolysis and combustion processes.The TG-FTIR results revealed that the temperature ranges of 205～405℃and 369～650℃corresponded to the stages of thermal decomposition and oxidative combustion of the material,respectively.Significant weight loss and notable heat release were observed in both stages,and an increase in heating rate led to a shift towards higher temperatures.The main pyrolysis products during the thermal decomposition stage were hydrogen chloride and chlorinated hydrocarbons,along with a small amount of alkanes.The major products during the oxidative combustion stage were CO2,with minor amounts of hydrogen chloride,chlorinated hydrocarbons,alkanes,aromatic compounds,and hydroxyl compounds.Cone calorimetry tests demonstrated that the heat release rate,smoke production rate,CO,and CO2 generation increased rapidly and reached peak values after PVC ignition,followed by a gradual decrease.Moreover,an increase in heat radiative intensity resulted in larger peak values and shorter peak times.Additionally,the increase in heat radiative intensity significantly reduced the ignition time,accelerated the mass loss rate,and increased the mass loss rate.
关键词
聚氯乙烯/热红联用/燃烧特性/火灾危险性Key words
Polyvinyl chloride/Thermogravimetric infrared spectroscopy/Combustion characteristics/Fire hazard引用本文复制引用
基金项目
灭火救援技术与装备应急管理部重点实验室强基计划(2022QX01)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据