How polymer architecture affects permanent viscosity loss of multigrade lubricants

SAE Technical Papers

Volumn , Issue , 1998, Pages

  Covitch, Michael J ^a  

^a LUBRIZOL CORPORATION   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

BLOCK COPOLYMERS; DEGRADATION; DIESEL ENGINES; GEL PERMEATION CHROMATOGRAPHY; HYDRODYNAMICS; LUBRICATING OILS; MOLECULAR ORIENTATION; MOLECULAR WEIGHT DISTRIBUTION; STARS; STYRENE;

AUTOMOTIVE LUBRICANTS; EXPERIMENTAL EVIDENCE; HEAVY-DUTY DIESEL ENGINE; HYDRODYNAMIC LUBRICATION; MOLECULAR ARCHITECTURE; MOLECULAR DEGRADATION; ORIGINAL EQUIPMENT MANUFACTURERS; POLYMER ARCHITECTURE;

VISCOSITY;

EID: 85072467136     PISSN: 01487191     EISSN: 26883627     Source Type: Journal    
DOI: 10.4271/982638     Document Type: Conference Paper

References (6)

1. Covitch M.J., Weiss J., and Kreutzer I.M., "Low Temperature Rheology of Engine Lubricants Subjected to Mechanical Shear: Viscosity Modifier Effects," 11th Internat. Colloq. on Indust. and Automotive Lubrication, Technische Akademie Esslingen, Germany, vol. II, 1429-1445 (1998)
2. McGirk, R.H., Hughes M.M., and Salazar L.C., "Evaluation of Polyolefin Elastomers Produced by Constrained Geometry Catalyst Chemistry as Viscosity Modifiers for Engine Oil," SAE Technical Paper No. 971696 (1997)
3. Bezot P., Hesse-Bezot; C., Constans B., Faure D., and Hoornaert P., "A Microscopic Study by Dynamic Light Scattering of Four Viscosity Index Improvers in Two Model Solvents and a Mineral Base Oil,"" SAE Technical Paper No. 932835 (1993)
4. Ver Strate G., and Struglinski M.J., "Polymers as Lubricating-Oil Viscosity Modifiers," in Polymers as Rheology Modifiers, Schulz D.N., and Glass J. E., eds., ACS Symp. Series 462, Am. Chem. Soc., pp. 256-272 (1991)
5. George H.F., and Hedrick D.P., "Comparative Rheology of Commercial Viscosity Modifier Concentrates," SAE Technical Paper No. 932834 (1993)
6. Selby T.W., "The Viscosity Loss Trapezoid-Part 2: Determining General Features of VI Improver Molecular Weight Distribution Using Parameters of the VLT," SAE Technical Paper No. 932836 (1993)