Skip navigation

Please use this identifier to cite or link to this item:
Title: Viscosity of associated mixtures approximated by the Grunberg-Nissan model
Authors: Marczak, Wojciech
Adamczyk, Natalia
Łężniak, Marta
Keywords: Aqueous solutions; Grunberg-Nissan model
Issue Date: 2012
Citation: "International Journal of Thermophysics" Vol. 33, no. 4 (2012), s. 680-691
Abstract: Previous experiments demonstrated that microheterogeneities occur in liquid systems (2-methylpyridine or 2,6-dimethylpyridine) + water. They are most probably due to the association of the hydrates through hydrogen bonds between water molecules. Substitution of methanol for water causes that the mixtures become homogenous. The results of viscometric studies reported in this study confirmed that the molecular clusters in aqueous solutions are much larger than the complexes occurring in the methanolic systems. Taking into consideration “kinetic entities” rather than monomeric molecules, the dependence of viscosity on concentration and temperaturę have been satisfactorily approximated by the Grunberg-Nissan relation with two adjustable coefficients. The kinetic entities were trimers of water, dimers of methanol, and monomeric amines. The same approach proved to be valid for the activation energy of viscous flow as well.
DOI: 10.1007/s10765-011-1100-1
ISSN: 0195-928X
Appears in Collections:Artykuły (WNŚiT)

Files in This Item:
File Description SizeFormat 
Marczak_Viscosity_of_associated_mixtures_approximated.pdf576,16 kBAdobe PDFView/Open
Show full item record

Uznanie autorstwa - użycie niekomercyjne 3.0 Polska Creative Commons License Creative Commons