以Mg(OH)2粒子稳定的Pickering乳液液滴为模板, 通过偶氮二异丁腈引发苯乙烯聚合, 制备出含水Mg(OH)2/聚苯乙烯复合材料。用扫描电子显微镜观测了复合材料的形貌, 用氧指数仪测定了复合材料的氧指数。结果表明, Mg(OH)2/聚苯乙烯复合材料中存在平均直径为155 μm的孔洞, 能够包裹一定质量的水。随着聚合温度的提高, 复合材料的含水量下降。 含水复合材料由于具有水和Mg(OH)2的双重阻燃作用, 氧指数显著高于Mg(OH)2/聚苯乙烯复合材料, 但力学性能有所下降。
Water–containing Mg(OH)2/PS composites were prepared by a polymerization reaction with the droplets of a Pickering emulsion as template. The morphology of the composites was characterized, and the oxygen index of the composites was measured. The results showed that the Mg(OH)2/PS composites had holes with an average diameter of about 155μm, which served as reservoirs for water. With the increase of polymerization temperature, the amount of water in the composites decreased. The oxygen index of the composites was much higher than that of the ordinary Mg(OH)2/PS composites, due to the dual flame retardant effect of water and Mg(OH)2. However, the mechanical properties of the water-containing Mg(OH)2/PS composites decreased.
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