反应型磷氮复合阻燃多元醇制备聚氨酯阻燃硬泡及性能

Preparation and Properties of Reactive Flame-Retarded Polyurethane Rigid Foam with Phosphorus-and Nitrogen-Containing Polyol

采用磷氮复合阻燃多元醇与通用聚醚配合制备阻燃聚氨酯硬泡,泡沫的尺寸稳定性均在1%左右,导热系数在0.03 W/(m·K)以下。压缩强度结果表明阻燃泡沫能满足一般建筑用聚氨酯硬泡保温材料的使用要求,动态力学测试表明泡沫的Tg随着阻燃聚醚用量的增加而升高,热失重测试表明硬泡的残炭量也随阻燃聚醚的增加而升高,阻燃多元醇制备的硬泡极限氧指数达到24.8%,较未做阻燃处理的泡沫有明显提高。

A phosphorus- and nitrogen-containing polyether polyol resulting from tetrakis （hydroxymethyl） phosphonium sulfate（THPS）was utilized as reactive fire-retardant to prepare the polyurethane rigid foam （PUR）. Experimental results show that the newly made tris （（N, N-his （hydroxyethyl）aminomethyl）phosphine oxide （THAPO） can accelerate the foaming speed, and result in a high dimensional stability and low thermal conductivity （less than 0.03 W/（m· K）） rigid foam. Compressive stress testing indicates that rigid foams are strong enough to meet commercial standard. In addition, DMA and TGA test suggest that the glass transition temperature （ Tg）, char yield （CR） and limited oxygen index （LOI） increase with the addition of THAPO and the highest LOI value reaches 24.8%.