Low Temperature Rheology of Commercial Base Stocks University of Houston

Format:

Conference/Event

Author/Creator:

Ravulapalli, Niranjan B., author.

Conference Name:

International Fuels and Lubricants Meeting and Exposition (1993-10-18 : Philadelphia, Pennsylvania, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1993

Summary:

AbstractTwo commercial base stocks are evaluated using a controlled stress rheometer, a cold cranking simulator and a scanning Brookfield viscometer. These oils form wax structures below 0°C that significantly influence viscosity. These structures break down with time under shear. This degradation process depends on the magnitude and duration of applied stress. A constant stress causes a continuous decrease in viscosity even after an hour of shear. Viscosity approaches a limiting value if the imposed shear stress increases at a constant rate. Repetitions of this test lead to a lower viscosity that is relatively insensitive to shear rate over the range of applied stress. In all cases, the wax structure does not readily reform after degradation for oils held at the test temperature. These results are used to suggest the domain of current procedures and their relation to higher temperature measurements

Notes:

Vendor supplied data

Publisher Number:

932832

Access Restriction:

Restricted for use by site license