阻燃剂分子量对聚氨酯软泡中阻燃剂迁移行为的影响

Effect of Flame Retardant Molecular Weight on Migration Behavior of Flame Retardant in Flexible Polyurethane(PU) Foam

研究阻燃剂分子量对聚氨酯软泡中阻燃剂迁移行为的影响。试验结果表明:1)在常温、反复压缩变形下,聚氨酯软泡中各分子量的阻燃剂基本无迁移;2)在烘烤条件下,阻燃剂分子量越大,阻燃剂迁移速度越小;在烘烤温度恒定时,烘烤时间和阻燃剂残余量之间都存在幂函数关系且相关性好,幂函数的系数和幂指数与阻燃剂的分子量大小有关,随着阻燃剂分子量的增大,软质聚氨酯泡沫塑料内部阻燃剂向表面迁移逐渐困难;3)在烘烤、反复压缩变形的综合因素影响下,各分子量的阻燃剂迁移情况与条件2类似。说明温度对阻燃剂迁移的影响至关重要。

The effect of flame retardant molecular weight on the migration behavior of flame retardant in flexible polyurethane （PU） foam was investigated. The results showed that, firstly repeated compression deformation had no effect on the migration behavior of flame retardant in flexible PU foam at room temperature. Secondly,under the conditions of baking,the greater flame retardant molecular weight, the slower migration of flame retardant, the baking time and the residual flame retardants conformed to power function when the baking temperature constant and the reflection of the function was well ,the coefficient of power function and exponential correlation with the molecular weight of flame retardants, the greater flame retardant molecular weight,the more difficulty the migration of flame retardant from inside of flexible polyurethane foam to the surface. Thirdly, influenced by comprehensive factors of baking condition and repeated compression deformation, the effect on the migration behavior as similar as the second case. The temperature affected remarkable to migration behavior of flame retardant.