氧化铋对环状膦酸酯阻燃棉织物的协效阻燃抑烟作用

The synergistic effects of bismuth oxide on flame retardancy and smoke suppression of the cotton fabric flame retarded with cyclic phosphonate

摘要:

摘要：本文通过阻燃性能测试、热重分析、锥形量热分析等手段研究了氧化铋对环状膦酸酯阻燃棉织物的阻燃抑烟协效作用。结果发现，在阻燃整理剂中添加0.4g/L的氧化铋，可以使阻燃棉布的极限氧指数从43%提高到52%；损毁炭长缩短到5cm，垂直燃烧达到B1级；而对断裂强度影响不大。热重分析表明，氧化铋的加入进一步降低了阻燃棉织物的初始分解温度和最大热解速率，500℃时的成炭量有所增加；扫描电镜显示添加氧化铋后，棉织物燃烧成炭更致密；氧化铋具有明显的抗燃烧变形能力；锥形量热测试表明氧化铋的添加不仅降低了阻燃棉织物的总热释放速率，而且使阻燃棉织物的总烟释放量降低了60%。

Abstract:

Abstract: The synergistic effects on flame retardancy and smoke suppression of the cotton fabric flame retarded with cyclic phosphonate ester MCPPE were discussed in this paper. The results showed that the LOI of flame retardant cotton with MCPPE increased from 43% to 52% as adding 0.4 g/L bismuth oxide in MCPPE flame retardant finishing agent. Damaged carbon length shortened to 5cm, vertical flame reached B1 level and for breaking strength the influence was not strong. Thermogravimetric analysis showed that bismuth oxide further reduced the initial decomposition temperature and maximum pyrolysis temperature. SEM showed the char of the burned cotton was denser after adding bismuth oxide and bismuth oxide had obvious resistance to deformation capacity. Cone test showed that bismuth oxide not only reduced the total heat release rate of flame retardant cotton fabrics but lowered total smoke yield 60%.