(1. 中南大学 化学化工学院，长沙 410083；
2. 中国铝业股份有限公司 郑州研究院，郑州 450041)
摘 要: 根据晶体成核与生长理论，使新生成的氢氧化镁以非均相成核方式均匀地沉积在氢氧化铝核材表面，形成氢氧化镁包覆氢氧化铝的核−壳结构，制备出兼有氢氧化铝和氢氧化镁优点的复合阻燃剂。研究温度、复合阻燃剂中氢氧化铝与氢氧化镁质量比、加料方式等对复合阻燃剂性能的影响，通过研究不同因素对铝镁复合阻燃剂热稳定性的影响效果，得到优化的工艺条件。结果表明：制备的铝镁复合阻燃剂初始热分解温度可提高到260 ℃，阻燃性能得到进一步提高，填充有机高聚物后其氧指数达到33，主要力学性能指标均优于国家标准要求值。
关键字: 铝镁复合阻燃剂；非均相沉淀；热稳定性
（1. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;
2. Zhengzhou Research Institute, Aluminum Corporation of China Limited, Zhengzhou 450041, China）
Abstract:According to the theory of crystal nucleation and growth, magnesium hydroxide was deposited on the surface of ATH by heterogeneous precipitation and the core-shell structure where aluminum hydroxide was coated with magnesium hydroxide was formed, then the composite flame retardant with both advantages of magnesium hydroxide and aluminum hydroxide was produced. The effects of synthetical temperature, the mass ratio of aluminum hydroxide to magnesium hydroxide in composite material and the addition manner of reactive materials on performance of the composite flame retardant were studied. The optimized process parameters were identifies by studying the effect of different factors on its thermo stability. The initial thermo-decomposed temperature of the composite flame retardant is increased to 260 ℃ and its flame retarding performance is improved. The oxygen index of the high polymer filled with it can reach 33 and the main mechanical performance outweighs the demand value of national standards.
Key words: aluminum magnesium composite flame retardant; heterogeneous precipitation; high thermo-stability
