Relationship between Film Forming Capability and Rheology of Lubricants with VI Improvers

摘要

The development of high-performance lubricants to insure the separation of mechanical parts, to reduce engine friction and fuel consumption remains a major challenge for oil manufacturers. Polymer additives called Viscosity Index Improvers (VI improvers) have been used for decades to limit the dependency of the lubricant's viscosity on temperature, to maintain an acceptable hydrodynamic lubrication at high temperature, without experiencing excessive frictional and thermal losses at low temperature.