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Evaluation of viscosities of polymer-water solutions used in aqueous two-phase systems
1Kimya Mühendisliği Bölümü, Mühendislik ve Mimarlik Fakültesi, Gazi Unviersitesi, Ankara, Turkey.
Abstract:
The dynamic viscosities of dilute aqueous poly(ethylene glycol) and dextran, and poly(ethylene glycol)-dextran-water solutions have been measured. The poly(ethylene glycol) and dextran samples had average molecular masses of 8000 Da and 580,000 Da, respectively. To estimate the values of viscosity of poly(ethylene glycol)-dextran-water solutions, a Grunberg like equation has been proposed which takes into account the influence of poly(ethylene glycol) and dextran concentrations. The relative errors vary between 0.76 and 11.64 in absolute value.