The Lubrication Properties of Binary Blends of S-4:Polyisobutene and S-4:Polyalpholephine-100

摘要

The lubrication behavior of two series of binary blends containing S-4: PAO-100 or S-4: PIB have been followed. Each series contains 5%, 10%, 15%, 20%, and 25% of PAO-100 or PIB. The results indicate that upon addition of PAO-tOO, viscosities, viscosity index, and flash point increase in a linear fashion. Meanwhile, pour point, TAN, and specific gravity remain constant. In the case of PIB, viscosities increase in an exponential manner, viscosity index increases then remains constant, flash point drops, and then leftovers remain constant. Other properties do not change considerably. The rheological properties of 15% and 25% blends of S-4: PAO-100 blends are similar to S-6 and S-8, respectively. Similar conditions exist for 5% and 10% of S-4: PIB blends. A motor oil which has been formulated by 15% S-4: PAO blend and a hydraulic oil which has been formulated by 5% S-4: PIB blend have shown good performance characteristics.