Results 191 to 200 of about 299,799 (244)
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NEMD Simulations of Viscosity and Viscosity Index for Lubricant-Size Model Molecules
International Journal of Thermophysics, 2002Synthetic lubricant research can be facilitated with nonequilibrium molecular dynamics simulations (NEMD) of viscosity and viscosity index (VI). While previously reported simulations using united atom (UA) models for intermolecular interactions have generally under-predicted the viscosity of lubricant-size alkanes, VI values, trends with respect to ...
Y. Yang, T. A. Pakkanen, R. L. Rowley
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Viscosity Index Tables for Celsius Temperatures
1975These tables were prepared to provide a convenient means of obtaining the viscosity index of petroleum products and lubricants without the necessity of calculation. They have been prepared under the sponsorship of Research and Development Division VII on Flow Properties of ASTM Committee D-2.
W. A. Wright +2 more
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ASTM Viscosity Index Tables Calculated from Kinematic Viscosity
1965Description These tables were prepared to provide a convenient means of obtaining the Viscosity Index of petroleum products and lubricants without the necessity of calculation. They have been prepared under the guidance of Research Division VII on Flow Properties, of ASTM Committee D-2 on Petroleum Products and Lubricants.
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Viscosity Index Improvers and Thickeners
2009Early in the history of the lubricants industry, the viscosity index (VI) was an important measure of quality, providing an indication of the potential of an oil for application over a wide temperature range. Pennsylvania grade oils (∼ 100 VI) were the standard against which all others were measured.
R.L. Stambaugh, B.G. Kinker
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Journal of Applied Polymer Science, 1978
AbstractCompositionally and structurally varied copolymers all containing n‐octadecyl acrylate were prepared and evaluated as viscosity index improvers in a common base oil under conditions of low shear. Systems evaluated over a range of copolymer and blend composition were: copolymers of n‐octadecyl acrylate with, respectively, methyl methacrylate, 2 ...
Edmund F. Jordan +5 more
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AbstractCompositionally and structurally varied copolymers all containing n‐octadecyl acrylate were prepared and evaluated as viscosity index improvers in a common base oil under conditions of low shear. Systems evaluated over a range of copolymer and blend composition were: copolymers of n‐octadecyl acrylate with, respectively, methyl methacrylate, 2 ...
Edmund F. Jordan +5 more
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Latitudes of Viscosity Index Values
Journal of Testing and Evaluation, 1977Abstract An alternative and simple procedure for the evaluation of numerical precisions of viscosity index values is developed. The procedure extends the former mathematical treatment of Marmin and Sommelet, resulting in greatly simplified equations.
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Boundary Film Formation by Viscosity Index Improvers
Tribology Transactions, 1996Ultrathin film interferometry has been used to measure the film-forming properties of a range of viscosity index improver (VII) solutions in rolling, concentrated contacts. It has been shown that some VIIs form boundary lubricating films of thickness 10 to 30 nm in contacts.
Matthew Smeeth +2 more
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A Rating System for Viscosity Index Improvers
SAE Technical Paper Series, 1973<div class="htmlview paragraph">The purpose of the work reported in this paper was to develop a simple and reliable method of comparing the relative merits of various polymers in a homogeneous sytem of base oils that might be used in multigraded motor oil applications.
J. V. Brancato, Wildrick Hart
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Standard Methods for Calculating Viscosity Index from Kinematic Viscosity
1972This Standard is issued under the fixed designation D 2270: the number immediately following the designation indicates the year of original adoption or. in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
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Production and Application Properties of Dispersive Viscosity Index Improvers
Industrial & Engineering Chemistry Research, 2012Polymeric dispersive viscosity index improvers of lubricating mineral oils based on styrene, dodecyl-methacrylate, octadecyl methacrylate and N, N-dimethylaminoethyl methacrylate (d-PSAMA) were produced by performing copolymerizations isothermally up to the high-conversion in mineral base oil solution, using monofunctional or bifunctional peroxide ...
Šoljić Jerbić, Ivana +2 more
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