MECHANICAL AND TRIBOLOGICAL PROPERTIES OF PA66/PPS BLENDS——(II) WATER LUBRICATION

The tribological properties of PA66/PPS blends were studied under water lubrication condition. It is found that the friction coefficients of blends dramatically decreases compared to PA66 and PPS, and are much less than that under dry siding condition. 70%φ(PA)/30%φ(PPS) blend has the best tribological properties under water lubrication. Scanning Electron Microscope (SEM) analysis showed that water restrained the ability of polymers to form transfer film on steel counterface, the friction and wear were governed by plowing specimen surface of asperities on counterface. Meanwhile, water used as refrigerant reduced the temperature at frictional interface.