An Analysis of Flow-Induced Miscibility of Polymer Blends

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45 Scopus citations

Abstract

The phase behavior of blends of polystyrene and poly(vinyl methyl ether) undergoing shearing flow was examined. Experiments conducted at a constant level of flow-induced strain found that such flow elevates the phase boundary and promotes miscibility. In the framework of the Cahn-Hilliard model for spinodal decomposition, an expression was developed which predicts the effect of an external flow field on the spinodal. The basis for this expression is the minimization of strain energy in a two-component polymer system that is in a thermodynamic state near its phase-separation point. The zero shear viscosities of the blends were measured and demonstrated to be an indication of one- or two-phase flow.

Original languageEnglish (US)
Pages (from-to)421-444
Number of pages24
JournalJournal of Macromolecular Science, Part B
Volume27
Issue number4
DOIs
StatePublished - Jan 12 1988

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Polymers and Plastics
  • Materials Chemistry

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