Flow of Mixtures of Poly(ethylene oxide) and Hydrolyzed Polyacrylamide Solutions Through Porous Media

N. Kauser, L. Dos Santos, M. Delgado, A. J. Müller, A. E. Sáez

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


In this work, the porous media flow of polymer solutions of poly(ethylene oxide) (PEO), hydrolyzed polyacrylamide (HPAA), and their blends is investigated. Aqueous solutions of PEO exhibit critical extension thickening when flowing through porous media. HPAA solutions also exhibit critical extension thickening in excess salt environments, but their behavior changes to a more gradual extension thickening when dissolved in deionized water. The mixtures of solutions of HPAA and PEO therefore vary its porous media flow behavior, depending on the ionic environment. In deionized water, a critical extension thickening similar to that obtained with PEO is still observed when HPAA is mixed in at concentrations low enough so that its apparent viscosity does not mask the influence of PEO. In the presence of salt, only a critical extension thickening is observed, which is attributed to transient network formation of both PEO and HPAA molecules. The mixtures generally exhibit a less critical behavior and display a lower than expected sensitivity of the onset Reynolds number for extension thickening with concentration. The results presented herein indicate that interspecies molecular interactions through transient network formation and the associated flow modification play a major role in determining the complex non-Newtonian flow behavior of these polymer solutions.

Original languageEnglish (US)
Pages (from-to)783-795
Number of pages13
JournalJournal of Applied Polymer Science
Issue number6
StatePublished - May 9 1999


  • Hydrolyzed polyacrylamide
  • Mixtures
  • Poly(ethylene oxide)
  • Porous media flow
  • Transient networks

ASJC Scopus subject areas

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry


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