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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155μm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。
Aqueous Mg (OH) _2 / polystyrene composites were prepared by the droplet of Pickering emulsion with Mg (OH) 2 particles as a template and the polymerization of styrene initiated by azobisisobutyronitrile. The morphology of the composites was observed by scanning electron microscopy. The oxygen index of the composites was measured by oxygen index. The results show that there is a hole with an average diameter of 155μm in Mg (OH) _2 / polystyrene composites, which can wrap a certain amount of water. As the polymerization temperature increases, the water content of the composite decreases. Due to the dual flame retardancy of water and Mg (OH) _2, the aqueous composites have significantly higher oxygen index than that of Mg (OH) _2 / polystyrene composites, but the mechanical properties of the composites decrease.