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

doi:10.1063/1.1790831

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 journal › Article › peer-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 language	English (US)
Pages (from-to)	6986-6997
Number of pages	12
Journal	Journal of Chemical Physics
Volume	121
Issue number	14
DOIs	https://doi.org/10.1063/1.1790831
State	Published - Oct 8 2004

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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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.",

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AU - Hooper, J. B.

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AU - Desai, T. G.

AU - Koshy, R.

AU - Keblinski, P.

PY - 2004/10/8

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N2 - 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.

AB - 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.

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

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