De Sá Costa, BernardoDos Reis Coimbra, Jane SéliaMartins, Márcio AreîdesGarcia-Rojas, Edwin ElardTelis-Romero, Javier [UNESP]De Oliveira, Eduardo Basílio2014-05-272014-05-272013-04-11Journal of Chemical and Engineering Data, v. 58, n. 4, p. 838-844, 2013.0021-95681520-5134http://hdl.handle.net/11449/75101The rheological behavior of poly(ethylene glycol) of 1500 g·mol -1(PEG1500) aqueous solutions with various polymer concentrations (w = 0.05, 0.10, 0.15, 0.20 and 0.25) was studied at different temperatures (T = 283.15, 288.15, 293.15, 298.15 and 303.15) K. The analyses were carried out considering shear rates ranging from (20 to 350) s-1, using a cone-and-plate rheometer under controlled stress and temperature. Classical rheological models (Newton, Bingham, Power Law, Casson, and Herschel-Bulkley) were tested. The Power Law model was shown suitable to mathematically represent the rheological behavior of these solutions. Well-adjusted empirical models were derived for consistency index variations in function of temperature (Arrhenius-type model; R2 > 0.96), polymer concentration (exponential model; R2 > 0.99) or the combination of both (R 2 > 0.99). Additionally, linear models were used to represent the variations of behavior index in the functions of temperature (R2 > 0.83) and concentration (R2 > 0.87). © 2013 American Chemical Society.838-844engBinary aqueous solutionsConsistency indexExponential modelsHerschel-BulkleyPolymer concentrationsPower law modelRheological behaviorsRheological modelsPolymersRheologySolutionsPolyethylene glycolsArtigo10.1021/je300712jWOS:000317553600002Acesso restrito2-s2.0-84876231631