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Autori: SORINA BORAN, ANDRA TĂMĂȘ, GIANNIN MOȘOARCĂ.
DOI: 10.24193/subbchem.2019.4.03
Published Online: 2019-12-20
Published Print: 2019-12-30
pp. 31-36
VIEW PDF: PDF
The paper presents the rheological characterization of a bio-ester with possible lubricant properties, obtained from soybean oil fatty acids. The rheological characterization was carried out under thermostatic conditions, using a Brookfield CAP2000+L viscometer in the characteristic domain of these fluids. The variation of the apparent viscosity ηa as a function of shear rate γ and the variation of the two indices (K and n) as a function of temperature were determined, as well as the flow activation energy, Ea from Arrhenius type equations. A rheological model was proposed.
Keywords: apparent viscosity, fatty acids, non-Newtonian behavior
