Theory for the chi parameter of polymer blends: Effect of attractive interactions

John G. Curro, Kenneth S. Schweizer

Research output: Contribution to journalLetter

Abstract

Using an integral equation theory for polymer blends, we have calculated the effective chi parameter for a binary blend of Gaussian polymers interacting with identical hard core repulsive and dissimiliar attractive interactions between chain segments. Our results predict a parabolic composition dependence for χ in qualitative accordance with recent neutron scattering experiments and Monte Carlo simulations. We also find that the attractive interactions induce structural correlations which tend to significantly reduce χ and thus stabilize the miscible mixture.

Original languageEnglish (US)
Pages (from-to)7242-7243
Number of pages2
JournalJournal of Chemical Physics
Volume88
Issue number11
DOIs
StatePublished - Jun 1 1988

Keywords

  • CHAINS
  • CORRELATIONS
  • HARD−SPHERE MODEL
  • INTEGRAL EQUATIONS
  • INTERMOLECULAR FORCES
  • LENNARD−JONES POTENTIAL
  • LIQUIDS
  • MIXTURES
  • POLYMERS
  • STRUCTURE FACTORS

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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