Nanosized Sb2O3 flame retardant with an average diameter of 30 nm was prepared by liquid phase homogeneous precipitation method with microwave heating. The preparation conditions were studied and optimized. Nanosized Sb2O3 has been characterized by means of XRD, TEM, FTIR. FTIR results show that IR absorption of nanosized Sb2O3 is red-shifted and strengthened. Microwave can promote the formation of nanosized Sb2O3. The concentration of urea affects particle size greatly. The nanosized Sb2O3 was applied to flame retarding polyethy lene (PE)/ethylene-vinyl acetate copolymer (EVA) foams. The mechanical properties and flame retardancy of the flame retarding PE/EVA foams were much improved.
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