Influence of morphology on the transport properties of polystyrene/polybutadiene blends: 2. Modelling results

N. Shah*, J. E. Sax, J. M. Ottino

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Unsteady-state and steady-state models are used to predict the effective diffusion coefficients, Deff, of small molecules in randomly interspersed polystyrene-polybutadiene blends and comparisons are made with experimental values obtained by sorption measurements. It is found that the polybutadiene and polystyrene phases are not topologically equivalent. This fact is responsible for the discrepancies between the experimental values of Deff and the predictions from standard steady-state models. Simulations of sorption experiments based on an unsteady-state model have shown that values of Deff obtained by different methods from the same sorption experiment differ consistently from each other. This supports the hypothesis that the experimentally observed differences between the various values of Deff, for a given blend-permeant pair, can be justified solely on the basis of morphological arguments.

Original languageEnglish (US)
Pages (from-to)1239-1246
Number of pages8
JournalPolymer
Volume26
Issue number8
DOIs
StatePublished - Aug 1985

Keywords

  • disordered media
  • models
  • morphology
  • polymer blends
  • transport

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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