Flow of solutions of hydroxypropyl guar-poly(ethylene oxide) mixtures through a porous medium |
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Authors: | A C Gamboa A E Sáez A J Müller |
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Affiliation: | (1) Grupo de Polímeros USB, Departamento de Termodinámica y Fenómenos de Transferencia y Departamento de Ciencia de los Materiales, Universidad Simón Bolívar, Apartado 89000, 1080-A Caracas, Venezuela;(2) Present address: POBA International #A 101, P.O. Box 02-5255, 33102-5255 Miami, FL, USA |
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Abstract: | Summary In flow through porous media, solutions of poly(ethylene oxide) (PEO) exhibit extension thickening, whereas hydroxypropyl
guar (HPG) solutions are shear-thinning at high concentrations. The results show that the extension-thickening exhibited by
PEO solutions becomes less critical with increasing flow rate as the concentration of HPG in the solution is increased. At
high concentrations of HPG, the presence of PEO inhibits the shear-thinning behaviour, without increasing the apparent viscosity
of the solution. The presence of HPG reduces the rate and extent of degradation of PEO in the flowing solution. |
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Keywords: | Polymer blends porous media molecular flexibility hydroxypropyl guar poly(ethylene oxide) |
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