摘要
本文采用磷元素接枝膨胀石墨(EG)制备了改性膨胀石墨(EGM),并研究其对聚氨酯泡沫(RRPUF)燃烧性能的影响。利用极限氧指数(LOI)和锥形量热研究了EGM对RPUF的阻燃性能的影响,通过扫描电镜和热重分析研究RPUF燃烧后残炭的微观形貌和阻燃机理。分析结果表明,RPUF/EGM的LOI和残炭量最高,热释放量和烟释放量均有大幅度的降低;RPUF/EGM燃烧生成的炭层也更加坚固致密。
In this paper expanded graphite( EG) was modified by the phosphorus element to obtained modified expanded graphite( EGM),and study combustion performance of the EGM was added into rigid polyurethane foam( RPUF).Limit oxygen index and cone calorimeter were used to study their flame retardancy of the RPUF samples.Carbon residue morphology of the RPUF samples after combustion and flame retardant mechanism was studied by scanning electron microscope and thermogravimetric analysis.The results showed that the highest LOI and char yield of the RPUF/EGM in all samples,and that the heat release rate and smoke production rate were greatly reduced.The carbon layer produced by RPUF/EGM is also more cohesive and compact.
作者
陈顺
高明
王昊
王彦霞
CHEN Shun GAO Ming WANG Hao WANG Yan-xia(School of Environmental Engineering, North China Institute of Science & Technology, Yanjiao, 065201, China)
出处
《华北科技学院学报》
2017年第4期120-124,共5页
Journal of North China Institute of Science and Technology
基金
中央高校基本科研业务费资助项目(3142017052
3142017065)
关键词
聚氨酯泡沫
膨胀石墨
阻燃性
锥形量热
热重分析
rigid polyurethane foam
EG
flame retardant
cone calorimeter
thermogravimetric analysis