PHYSICAL CHEMISTRY AND RHEOLOGICAL BEHAVIOR OF COMMERCIAL POLYMERS OF VISCOSITY INDEX IMPROVER USED IN MOTOR OIL INDUSTRY

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SADEGHI GHARI HEDAYATOLLAH; SHAKOURI ZAHRA

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Journal: Iranian Journal of Polymer Science and Technology Year:2011 | Volume:24 | Issue:3 (ISSUE NO. 113) Page(s): 205-214

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Title

PHYSICAL CHEMISTRY AND RHEOLOGICAL BEHAVIOR OF COMMERCIAL POLYMERS OF VISCOSITY INDEX IMPROVER USED IN MOTOR OIL INDUSTRY

Author(s)

SADEGHI GHARI HEDAYATOLLAH | SHAKOURI ZAHRA | Issue Writer Certificate

Keywords

ENGINE OILQ2

OLEPHIN COPOLYMERQ2

VISCOSITYQ3

VISCOSITY INDEX IMPROVERQ2

SHEAR STABILITYQ2

Abstract

Nowdays, production of high quality ENGINE OILs is one of the worries of our country’s ENGINE OIL industry. In this study, the behavior of four commercial polymers used in nation motor oil industry in obtaining the best VISCOSITY index improver was investigated. In this regard, viscometric behavior, SHEAR STABILITY and polymers’ performance for engine cranking were compared at low temperature. In this respect, viscometry behavior of polymer solutions with different concentrations (0.3, 0.5, 0.7 and 1% by weight) in terms of physical chemistry parameters such as specific VISCOSITY, intrinsic VISCOSITY, VISCOSITY ratio, thickening power and VISCOSITY index were compared with each other. The activation energy of each polymer solution was calculated using the Arrhenius equation and polymer performance was evaluated with respect to activation energy changes and lower oil temperature sensitivity.In continuation, the SHEAR STABILITY of these commercial polymers in solution state was evaluated. Based on SHEAR STABILITY analysis an inverse relationship was found between polymers’ SHEAR STABILITY and their molecular weights. Finally, the behavior of the commercial polymers was investigated for determination of optimum performance in engine cranking at-15oC. Based on the obtained data, the most suitable polymer was identified and indicated as the best to fulfil oil industry’s purposes. In this respect the high-tech polymers, based on their molecular structures demonstrate the best performance compared to other polymers. Paratone and Viscotech polymers have relatively shown similar behaviors, although based on viscometric behavior the Viscotech is better than Paratone, and based on shear behavior the order of preference is reversed. Keltan polymer has just a better thickening power while, it is not considered suitable for high quality ENGINE OIL at low temperatures of engine cranking for its weak shear performance and low efficiency.

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APA: Copy

SADEGHI GHARI, HEDAYATOLLAH, & SHAKOURI, ZAHRA. (2011). PHYSICAL CHEMISTRY AND RHEOLOGICAL BEHAVIOR OF COMMERCIAL POLYMERS OF VISCOSITY INDEX IMPROVER USED IN MOTOR OIL INDUSTRY. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), 24(3 (ISSUE NO. 113)), 205-214. SID. https://sid.ir/paper/365801/en

Vancouver: Copy

SADEGHI GHARI HEDAYATOLLAH, SHAKOURI ZAHRA. PHYSICAL CHEMISTRY AND RHEOLOGICAL BEHAVIOR OF COMMERCIAL POLYMERS OF VISCOSITY INDEX IMPROVER USED IN MOTOR OIL INDUSTRY. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN)[Internet]. 2011;24(3 (ISSUE NO. 113)):205-214. Available from: https://sid.ir/paper/365801/en

IEEE: Copy

HEDAYATOLLAH SADEGHI GHARI, and ZAHRA SHAKOURI, “PHYSICAL CHEMISTRY AND RHEOLOGICAL BEHAVIOR OF COMMERCIAL POLYMERS OF VISCOSITY INDEX IMPROVER USED IN MOTOR OIL INDUSTRY,” IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), vol. 24, no. 3 (ISSUE NO. 113), pp. 205–214, 2011, [Online]. Available: https://sid.ir/paper/365801/en

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