Structure, surface excess and effective interactions in polymer nanocomposite melts and concentrated solutions

J. B. Hooper, K. S. Schweizer, T. G. Desai, R. Koshy, P. Keblinski

Research output: Contribution to journalArticlepeer-review

Abstract

The structure, effective forces, and thermodynamics in dense polymer-particle mixtures were analyzed using the Polymer Reference Interaction Site Model (PRISM) theory. Depletion interactions, induced by polymer were quantified through the particle-particle pair correlation function and potential of mean force. It was found that a transition from monotonic decaying, attractive depletion interactions to much stronger repulsive-attractive oscillatory depletion forces took place at nearly the semidilute-concentrated solution boundary. The results show that the particle-particle potential of mean force shows multiple qualitatively different behaviours which rely on the strength and spatial range of the polymer-particle attraction.

Original languageEnglish (US)
Pages (from-to)6986-6997
Number of pages12
JournalJournal of Chemical Physics
Volume121
Issue number14
DOIs
StatePublished - Oct 8 2004

ASJC Scopus subject areas

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

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