Interferometric study of transition from weak to strong penetration of a polymer solution into a porous silica bead

Research output: Contribution to journalArticle

Abstract

The concentration equilibrium of polymer molecules with a porous medium was studied using a Jamin interferometer and digital image analysis. A porous silica bead was immersed into a solution of the polymer in a solvent isorefractive with silica. The concentration of the polymer in the porous medium was measured as the concentration in the exterior solution was changed in a wide range from dilute to semidilute. For all the chain dimensions studied, the partition coefficient increased to a value close to unity, as the exterior solution became semidilute, a result in agreement with theoretical predictions of the weak-to-strong penetration transition. The transition was, however, found to be more diffuse than predicted. The difference can be partly ascribed to a distribution in the effective pore diameter of the network-structured porous medium.

Original languageEnglish (US)
Pages (from-to)2430-2439
Number of pages10
JournalMacromolecules
Volume29
Issue number7
StatePublished - Mar 25 1996

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Polymer solutions
Silicon Dioxide
Porous materials
Polymers
Silica
Interferometers
Image analysis
Molecules

ASJC Scopus subject areas

  • Materials Chemistry

Cite this

Interferometric study of transition from weak to strong penetration of a polymer solution into a porous silica bead. / Teraoka, Iwao.

In: Macromolecules, Vol. 29, No. 7, 25.03.1996, p. 2430-2439.

Research output: Contribution to journalArticle

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