原位增容法膨胀型非卤阻燃聚丙烯耐潮湿老化研究

Study on Humid Aging Resistance of Intumescent Halogen-free Flame Retardant PP Prepared by In-situ Compatibilizing

采用原位反应增容法制备了膨胀型非卤阻燃PP,着重探讨了该材料在(70±2)℃水中的浸泡时间对其防吸潮性能、阻燃性能和微观结构的影响。结果表明:在(70±2)℃水中浸泡168h后,所得膨胀型非卤阻燃PP的质量损失率小于2%,氧指数大于32%,水平燃烧仍保持在FH-1的最高级别,垂直燃烧则在浸泡96h后由FV-0降至FV-1,说明原位反应增容技术有效降低了阻燃剂粒子在潮湿环境中的溶解与迁移,提高了阻燃材料耐潮湿老化的能力。

Halogen-free flame retardant PP was prepared by means of reactive in-situ compatibilizing. The effects of immersion time in （70 ± 2） ℃ water on the humidity resistance, flame retardance and microstructure of the prepared PP were studied in details. The results showed that after being immersed in （70 ± 2） ℃ water for 168 h, the weight loss rate of the prepared halogen-free flame retardant PP was still less than 2 %, LOI was more than 32%, horizontal firing testing results kept in the range of FH-1, and vertical firing testing results changed from FV- 0 to FV-1 after being immersed in the water for 96 h, which indicated in-situ compatibilizing efficiently decreased the dissolving and diffusing of the flame retardant particles from PP matrix, and improved the humid aging resistance of the flame retardant PP.