Abstract: Poly (phenylene sulfide ) ( PPS) / NdxFe94?xB6 composites were prepared via melt mixing. The morphology ,mechanical and electromagnetic properties of PPS / NdxFe94?xB6 composites were studied. The results indicated that NdxFe94?xB6 particles were well dispersed in the PPS matrix. In contrast to pure PPS resin , tensile strength，bending strength and impact strength of the composites increased by 100 %,44 %,800 %,respectively; whereas overloading NdxFe94?xB6 decreased the mechanical properties；the permittivity and magnetic conductivity increase with the content of NdxFe94?xB6. At the frequency range 0.5~18 GHz, the imaginary parts of permittivity increase obviously in high contents. It was found that the composites have excellent microwave absorbing characteristics at the high frequency range, while matching thickness was 2 mm, the maximum reflection loss was about -18.3 dB corresponding to the frequency 16.6 GHz when the NdxFe94?xB6 content was 50 %.

Key words: Poly(p-phenylene sulfide), NdxFe94-xB6, composite, mechanical property, electromagnetic property