Accession Number : AD0698027

Title :   DEVELOPMENT OF A LABORATORY TECHNIQUE FOR DEFINING MECHANICAL SHEAR STABILITIES OF MULTI-GRADE ENGINE OILS.

Descriptive Note : Final rept.,

Corporate Author : ARMY COATING AND CHEMICAL LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : LePera,Maurice E. ; Pigliacampi,Jules

Report Date : NOV 1969

Pagination or Media Count : 28

Abstract : A program was initiated to define the mechanical shear stability of polymer-thickened lubricating oils in terms of a laboratory bench-scale technique. In subsequent evaluation studies using standard laboratory-type paint blending/mixing devices, a 'kinetic dispersion mill' was found to induce shear degradation of polymer thickeners in multi-grade engine oils. Further refinement of this technique led to the establishing of a satisfactory correlation with single and multicylinder engine tests. (Author)

Descriptors :   (*INTERNAL COMBUSTION ENGINES, LUBRICANTS), (*LUBRICANTS, PHYSICAL PROPERTIES), (*LABORATORY EQUIPMENT, FEASIBILITY STUDIES), TEST METHODS, TEST EQUIPMENT, LUBRICANT ADDITIVES, STABILITY, DEGRADATION, VISCOSITY, POLYMERS, SHEAR STRESSES, PERFORMANCE(ENGINEERING)

Subject Categories : Lubricants and Hydraulic Fluids
      Test Facilities, Equipment and Methods
      Reciprocating and Rotating Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE