Abstract: The effect of polyamide 66（PA66）on the tribological properties of glass fiber(GF)-reinforced polyphenylene sulfide(PPS) composites was studied. The inclusion of PA66 decreased the friction coefficients of PPS composites. When PA66 content was 40 wt%, the wear rate of the composites decreased from 13.60 to 5.24 mm3. The morphology of wear surface was investigated using SEM. It revealed that wear mechanisms of composites transformed from abrasive into adhesive wear with PA66 introduced. PA66 formed a non-uniform and discontinuous adhesive transfer film on steel counterface, while PPS did not. The maximum of the tangent of phase shift (tan δ) and storage modulus(E’) could be related with friction coefficients. The higher the (tan δ) maximum and E’, the smaller the friction coefficient smaller.

Key words: polyphenylene Sulfide, polyamide 66, friction, wear, storage modulus