为了提高聚合物的耐燃性，应该使用一种能使聚合物形成炭化层的无卤阻燃剂，我们选用了硅胶以及硅胶和碳酸钾的混合物作为ＰＰ、ＰＶＡ 的阻燃剂，并探讨了该新型阻燃剂在其它聚合物中使用的可能性。实验表明，该阻燃剂具有明显的阻燃效果。同时本文在添加剂存在下，利用固相 ＮＭＲ 分析了炭化层的结构，探讨了阻燃剂的阻燃机理。 In order to improve the flame resistance of the polymer, a kind of halogen-free flame retardant which can make the polymer to form a carbonized layer should be used. We choose silica gel and a mixture of silica gel and potassium carbonate as the flame retardant of PP and PVA. The possibility of new flame retardants for use in other polymers. Experiments show that the flame retardant has obvious flame retardant effect. In the meantime, the structure of the carbonized layer was analyzed by solid-phase NMR in the presence of additives, and the flame retardant mechanism of the flame retardant was also discussed.