摘要
为了研究丙烯腈-丁二烯-苯乙烯(ABS)的热解燃烧特性,采用锥形量热仪和热重分析仪,测试不同厚度的ABS在不同辐射强度下的燃烧特性和不同升温速率下的热稳定性。结果表明:由于厚度的增加,ABS点燃困难,不同辐射强度下,热释放速率的峰宽明显增大。同等厚度下,辐射强度越高,热释放速率峰值增加,持续燃烧时间降低。通过热薄型点燃时间模型,计算2 mm和3 mm的ABS的临界辐射热流为15.85 kW/m~2和17.54 kW/m~2。随着升温速率的增大,ABS材料的热解过程时间逐渐缩短,最大热分解速率升高。不同升温速度下的ABS总体质量损失趋势大致相同,材料质量损失率随着升温速率的改变而没有明显的规律性变化。火灾危险性与辐射强度成正比,火灾危险性与厚度成反比。
In order to study the pyrolysis combustion characteristics of acrylonitrile-butadiene-styrene(ABS),the combustion characteristics of ABS with different thicknesses under different radiation intensities and the thermal stability at different heating rates were measured by cone calorimeter and thermogravimetric analyzer.The results show that the ignition of ABS is difficult due to the increase of thickness,and the peak width of heat release rate increases obviously under different radiation intensities.At the same thickness,the higher the radiation intensity,the higher the peak heat release rate and the shorter the continuous burning time.The critical radiative heat fluxes of ABS with 2 mm and 3 mm are calculated to be 15.85 kW/m~2 and 17.54 kW/m~2 by the thermal thin ignition time model.With the increase of heating rate,the pyrolysis process time of ABS material gradually is shortened,the maximum thermal decomposition rate is increased.The overall mass loss trend of ABS under different heating rates is roughly the same,and the material mass loss rate has no obvious regular change with the change of heating rate.The fire risk is proportional to the radiation intensity,and the fire risk is inversely proportional to the thickness.
作者
朱倩
刘全义
马凯庆
王奕青
张奔
ZHU Qian;LIU Quan-yi;MA Kai-qing;WANG Yi-qing;ZHANG Ben(College of Civil Aviation Safety Engineering,Civil Aviation Flight University of China,Guanghan 618307,China;Civil Aircraft Fire Science and Safety Engineering Key Laboratory of Sichuan,Civil Aviation Flight University of China,Guanghan 618307,China)
出处
《塑料科技》
CAS
北大核心
2022年第10期17-22,共6页
Plastics Science and Technology
基金
国家自然科学基金(U2033206)。
关键词
丙烯腈-丁二烯-苯乙烯
热解特性
燃烧特性
火灾危险性
Acrylonitrile-Butadiene-Styrene
Pyrolysis characteristics
Combustion characteristics
Fire risk
作者简介
联系人:刘全义,quanyiliu2005@126.com。
