一种无机复合聚苯板的制备与燃烧性能研究
Study on preparation and combustion performance of an inorganic composite polystyrene board
王鹏宇 1司广旭 2梁庆刚 2周亮3
作者信息
- 1. 北京建筑材料检验研究院股份有限公司,北京 100041
- 2. 北京雅达润邦建筑材料有限公司,北京 100176
- 3. 北京科技大学 土木与资源工程学院/大安全科学研究院,北京 100083
- 折叠
摘要
采用具有负热值特性的半水硫酸钙等无机材料为主要添加剂制备阻燃浆液,以低密度膨胀聚苯乙烯泡沫为基体,使用负压顺孔与负压吸附技术,制备了无机复合聚苯板;使用导热系数测试仪测试了该复合材料的保温性能,使用氧指数测试仪、热值测试仪、锥形量热仪、单体燃烧装置测试其燃烧性能.经检测,该无机复合聚苯板的导热系数为0.041 W/(m2.K),热值仅为 2.91 MJ/kg,氧指数达到 39.7%;锥形量热仪测试结果显示,该复合聚苯板在燃烧过程中未发生收缩熔融,且保持一定的形状,其热释放速率峰值、总热释放量、产烟速率峰值以及总产烟量相比聚苯乙烯泡沫基材大幅降低;单体燃烧测试结果显示,该无机复合聚苯板的燃烧性能等级达到A2级,产烟特性等级达到S1级;分析其阻燃机理,认为主要源于二水硫酸钙吸热的分解反应和惰性的分解产物.
Abstract
First,inorganic materials such as hemihydrate calcium sulfate with negative calorific value were used as the main addi-tives to prepare a flame retardant slurry.Then a low-density ex-panded polystyrene(EPS)foam was used as the matrix.And negative pressure was adopted to open cavities between EPS beads and promote the absorption of the flame retardant slurry.Afterwards,the insulation performance of the obtained expanded polystyrene composite with inorganic additives(EPSC)was tested using a thermal conductivity tester,while its combustion performance was tested using an oxygen index tester,a calorific value tester,a cone calorimeter,and a single burning item(SBI).According to the above tests,the thermal conductivity of EPSC is 0.041 W/(m2∙K),the calorific value is only 2.91 MJ/kg,and its oxygen index reaches 39.7%.The cone calorimeter test results demonstrate that EPSC does not shrink nor melt during the com-bustion process.And the peak heat release rate,total heat re-leased,peak smoke production rate and total smoke production of EPSC are significantly lower than those of the EPS matrix.The SBI test results show that the fire classification of EPSC reaches A2 level,and the smoke production classification reaches S1 level.The flame retardant mechanism is mainly due to the endo-thermic decomposition reaction of calcium sulfate dihydrate and the inert decomposition products.
关键词
无机复合聚苯板/锥形量热仪/单体燃烧装置/燃烧性能/阻燃机理Key words
expanded polystyrene composite with inorganic addi-tives/cone calorimeter/single burning item/combustion perfor-mance/flame retardant mechanism引用本文复制引用
基金项目
北京市自然科学基金项目(8222021)
住房和城乡建设部研究开发项目(2022-k-042)
出版年
2024
NETL
NSTL
万方数据