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Synthesis of viscosity index improver for motor lubricating oil
2021The viscosity of lubrication oil is the important property to evaluate the behavior of lubrication activity of oil. Viscosity index VI is the standard indicator of effecting temperature on viscosity of lubricating oil. Viscosity index improvers are the chemicals that added to base lubricating oil produced from refineries to make oil stable against ...
Kuraimid, Zaydoon +3 more
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Mechanism of action of viscosity index improvers
Tribology International, 1978Abstract One reason for using polymeric additives is to obtain a product which has better viscosity-temperature characteristics than a comparable pure mineral oil. Measurements of the viscosity-temperature behaviour of motor oils with and without polymer addition show the necessity of a revision of the generally accepted concept of the mechanism of ...
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Study of Viscosity Index Improver for Fuel Economy ATF
SAE Technical Paper Series, 2003<div class="htmlview paragraph">One very effective way to improve fuel economy of motor vehicles is to reduce the viscosity of the automatic transmission fluid (ATF). However, viscometric constraints often exist for a particular ATF application.
Nobuharu Umamori, Takanori Kugimiya
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Some styrene alkyl‐methacrylate copolymers as viscosity index improvers
Journal of Chemical Technology & Biotechnology, 1986AbstractStyrene alkyl‐methacrylate copolymers were synthesised at different monomer percentage ratios and under varied reaction conditions. Evaluation of obtained copolymers as viscosity index improvers in multigrade motor oils has been carried out in relation to different reaction variables and a comparative evaluation with commercially available ...
H. H. Abou el Nage +3 more
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The Behavior of Polymers as Viscosity Index Improvers
Petroleum Science and Technology, 2008Abstract In the present work, six copolymers were prepared by reaction of 2-ethylhexyl methacrylate with vinyl acetate monomer by different molar ratio to produce copolymers (ν1, ν2, ν3, ν4, ν5, and ν6). The composition of these copolymers were determined by molecular weight (using Gel Permeation Chromatography (GPC) Water 600 E.) and by 1HNMR (by 300 ...
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An Improved Method for Calculating Viscosity Index (VI) of Low Viscosity Base Oils
Journal of Testing and Evaluation, 2017Abstract The phenomenon of “VI droop” has been observed for many years for low viscosity oils within a given family of base oils. Whereas base oils with 100°C kinematic viscosity greater than 4 mm2/s (cSt) easily conform to the nominal API base oil group of its family, 2 and 3 mm2/s products often do not.
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Investigation of polyacrylates copolymers as lube oil viscosity index improvers
Journal of Petroleum Science and Engineering, 2012Abstract Six copolymers, based on polyacrylates, were prepared and evaluated as viscosity index improvers for lube oil. The synthesizing process begins by estrification of acrylic acid with different alkyl chain length alcohols (octyl, decyl, octadecyl, tetradecyl, and hexadecyl alcohol), ranging from C 8 to C 16 .
Salah A. Mohamad +3 more
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Extended Shear Stability of Viscosity Index Improvers in Lubricating Oils
SAE Technical Paper Series, 2014<div class="section abstract"><div class="htmlview paragraph">The ability of oil to retain its viscometric properties is particularly important in Heavy Duty Engine Oil applications to prevent wear and maintain intended levels of oil pressure.
Carrie B. Sims +3 more
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Alkyl methacrylate and styrene terpolymers as lubricating oil viscosity index improvers
Chemistry and Technology of Fuels and Oils, 2007The properties of styrene / dodecyl methacrylate / octadecyl methacrylate terpolymers as viscosity index improvers of lubricating mineral oils were investigated. Terpolymers of different composition and molar mass were prepared by peroxide initiated polymerization of the monomer mixture in a mineral base oil solution.
Jukić, Ante +2 more
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An ‘in lubro’ study of viscosity index improvers in end contacts
Lubrication Science, 1990AbstractPolymeric viscosity index (VI) improver solutions in oils suffer from both temporary and permanent viscosity losses in high shear hydrodynamic and elastohydrodynamic (EHD) contacts. In some cases in EHD contacts, these losses can be so severe that the additive makes negligible contribution to oil film thickness.This paper describes the use of a
R. W. M. Wardle +3 more
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