Flow Activation Quantities of VI-improver-blended Mineral Lubricating Oils
1977 年 19 巻 2 号 p. 131-134
詳細
1977 年 19 巻 2 号 p. 131-134
The flow activation quantities were experimentally determined at 25.0°C with mineral lubricating oils blended with various concentrations of VI-improver. While polylauryl-methacrylate increases activation volume substantially and decreases activation entropy considerably, it does not affect activation enthalpy. Polyisobutylene changes the quantities only slightly. Molecular interpretation of these observations has been attempted.
