Multicomponent diffusion in phase-separating polymer blends with different frictional interactions: A mean-friction model

Masato Yamamura, Toshihisa Kajiwara, Hiroyuki Kage

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We present a compact formula for describing the mean frictional forces acting on a molecule in multicomponent systems. The friction-based diffusion theory of Zielinski and Hanley was extended to newly include the friction-average molar velocity as a reference frame. The results showed that the previous diffusion theories are unified by the friction-average concept by properly choosing the average velocity. The present model based on the diffusivity-related molar average velocity provides better predictions for the diffusive flux in a ternary miscible liquid compared to the other existing theories. The application of the model in phase-separating ternary systems revealed that the introduction of a highly diffusive third component into demixing polymer blends promotes a particular enhancement of the spinodal decomposition due to the difference in the frictional interactions between polymers.

Original languageEnglish
Pages (from-to)3891-3899
Number of pages9
JournalChemical Engineering Science
Volume58
Issue number17
DOIs
Publication statusPublished - Sep 2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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