Flow of monodisperse polystyrene solutions through porous media

Avelino E Saez, A. J. Müller, J. A. Odell

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

In this work, we study the origin of the extension thickening commonly observed when solutions of flexible polymers flow through porous media and ideal elongational flows. We have used randomly packed beds of glass beads as porous media. We have performed experiments with closely monodisperse atactic polystyrene of different molecular weights dissolved in organic solvents. The use of a closely monodisperse polymer allowed us to make a more meaningful comparison between the results obtained using opposed jets and porous media flow, as compared to previous works on polydisperse polymers. The results indicate that the coil-stretch transition of isolated polymer molecules in solution cannot be the only mechanism responsible for the extension thickening. It is clear that part of the observed effect is due to the extension of isolated molecules, but the main factor causing a great increase in the elongation viscosity beyond a critical strain rate is the formation of transient entanglement networks.

Original languageEnglish (US)
Pages (from-to)1224-1233
Number of pages10
JournalColloid & Polymer Science
Volume272
Issue number10
DOIs
StatePublished - Oct 1994
Externally publishedYes

Fingerprint

Polystyrenes
Porous materials
polystyrene
Polymers
polymers
Molecules
Packed beds
beads
Organic solvents
elongation
strain rate
beds
Strain rate
molecules
Elongation
molecular weight
coils
Molecular weight
Viscosity
viscosity

Keywords

  • elongational flow
  • elongational viscosity
  • entanglements
  • monodisperse polystyrene
  • Porous media

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

Cite this

Flow of monodisperse polystyrene solutions through porous media. / Saez, Avelino E; Müller, A. J.; Odell, J. A.

In: Colloid & Polymer Science, Vol. 272, No. 10, 10.1994, p. 1224-1233.

Research output: Contribution to journalArticle

Saez, Avelino E ; Müller, A. J. ; Odell, J. A. / Flow of monodisperse polystyrene solutions through porous media. In: Colloid & Polymer Science. 1994 ; Vol. 272, No. 10. pp. 1224-1233.
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