微波晶化法合成柱撑纳米层状双氢氧化物及其对PP阻燃性能的研究

Studies on Preparation of Nanocrystalline Layered Double Hydroxides under Microwave Irradiation and Their Flame Retardant Properties in PP

采用低饱和态共沉淀,辅助微波手段快速合成了纳米ZnAl-C_6H_5SO_3LDHs,其粒径为20～100nm,分散性较好、颗粒团聚少。将其应用于聚丙烯(PP)中,详细研究其对PP阻燃性能及抑烟性能的影响。经氧指数(LOI)、扫描电镜(SEM)和锥形量热仪(CONE)等研究表明,改性后的LDHs在PP材料中分散良好,在将PP氧指数有效提高到28的同时降低了材料的热释放速率,有效延缓和抑制了材料的烟释放速率。

Nanocrystalline ZnAl-C6 H5 SO3 LDHs with the particle size of 20- 100nm and the good dispersion arerapidly prepared by the technology of the microwave-crystallization and low saturated state of coprecipitation. The synthesized sample is applied to polypropylene（PP）,and the properties of flame retardant in PP is studied in detail by the techniques of limiting oxygen index（LOI）, scanning electron microscopy（SEM）, cone calorimeter（CONE）, and so on. The results show the dispersion of additives in PP is uniform, the LOI of the composite is up to 28. Moreover, it can be found the modified LDHs can reduce heat release rate of PP, and effectively delay and inhibit the smoke release rate of PP.