摘要
为了研究聚甲基丙烯酸甲酯(PMMA)在添加不同质量比的氢氧化铝(ATH)与氢氧化镁(MH)粉后燃烧特性的变化,使用锥形量热仪测试添加3种不同质量比的ATH与MH的PMMA的热释放性能、质量损失速率变化,并对其火灾危险性进行研究。结果表明:未添加阻燃剂时,200目PMMA热释放速率峰值最高,为378.32 kW/m^(2),到达峰值的时间为80 s;质量损失速率峰值为0.154 g/s,到达峰值的时间为140 s。500目PMMA热释放速率峰值为361.35 kW/m^(2),到达峰值的时间为65 s;质量损失速率峰值最低,为0.153 g/s,到达峰值的时间为70 s。对3种粒径的PMMA进行火灾危险性分析,500目PMMA的火灾增长系数(FGI)最高,为5.56 kW/(m^(2)·s)。当ATH∶MH为2∶1时,500目PMMA热释放速率峰值最低,为93.72 kW/m^(2);点燃时间最长,为83 s;FGI最低,为1.91 kW/(m^(2)·s)。当ATH∶MH为2∶1时,对PMMA燃烧性能的抑制效果最理想。
In order to study the change of combustion characteristics of polymethylmethacrylate(PMMA)after adding different mass ratios of aluminum hydroxide(ATH)and magnesium hydroxide(MH)powder,the cone calorimeter was used to test the heat release performance and mass loss rate of PMMA with three different mass ratios of ATH and MH,and the fire risk was studied.The results show that when no flame retardant is added,the peak heat release rate of 200 mesh PMMA is the highest,which is 378.32 kW/m^(2),and the time to reach the peak is 80 s.The peak of mass loss rate is 0.154 g/s,and the time to reach the peak is 140 s.The peak heat release rate of 500 mesh PMMA is 361.35 kW/m^(2).The time to reach the peak is 65 s.The peak value of mass loss rate is the lowest,which is 0.153 g/s,and the time to reach the peak is 70 s.The fire hazard analysis of PMMA with three particle sizes showes that the fire growth factor(FGI)of 500 mesh PMMA is the highest,which is 5.56 kW/(m^(2)·s).When ATH∶MH is 2∶1,the peak heat release rate of 500 mesh PMMA is the lowest,which is 93.72 kW/m^(2),the longest ignition time is 83 s,the lowest FGI is 1.91 kW/(m^(2)·s).When ATH∶MH is 2∶1,the inhibition effect on the combustion performance of PMMA is the best.
作者
郑聪聪
袁树杰
ZHENG Cong-cong;YUAN Shu-jie(School of Safety Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China)
出处
《塑料科技》
CAS
北大核心
2023年第9期50-53,共4页
Plastics Science and Technology
关键词
聚甲基丙烯酸甲酯
氢氧化铝
氢氧化镁
火灾危险性
燃烧性能
Polymethylmethacrylate
Aluminum hydroxide
Magnesium hydroxide
Fire hazard
Combustion performance
