Macromolecular theory of solvation and structure in mixtures of colloids and polymers

Details Macromolecular theory of solvation and structure in mixtures of colloids and polymers Macromolecular theory of solvation and structure in mixtures of colloids and polymers

2001-04-09

arxiv.org/abs/cond-mat/0104154v1

Physics

Condensed Matter

Soft Condensed Matter

23 pages, 10 figures

Scientific paper

10.1103/PhysRevE.64.021514

The structural and thermodynamic properties of mixtures of colloidal spheres and non-adsorbing polymer chains are studied within a novel general two-component macromolecular liquid state approach applicable for all size asymmetry ratios. The dilute limits, when one of the components is at infinite dilution but the other concentrated, are presented and compared to field theory and models which replace polymer coils with spheres. Whereas the derived analytical results compare well, qualitatively and quantitatively, with mean-field scaling laws where available, important differences from ``effective sphere'' approaches are found for large polymer sizes or semi-dilute concentrations.

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