2006/05/22 by Sergio Caracciolo, Bortolo Matteo Mognetti, Andrea Pelissetto · 2 citations
Chemical Engineering · Chemistry · Engineering · Physics and Astronomy · #Electrostatics and Colloid Interactions #Nanopore and Nanochannel Transport Studies #Rheology and Fluid Dynamics Studies #cond-mat.stat-mech
paper · pdf · doi:10.1063/1.2338913
published as J. Chem. Phys. 125: 094903, 2006 · 26 pages, 4 figures
arxiv created 2006/05/22 · openalex publication_date 2006/09/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We determine the second, third, and fourth virial coefficients appearing in the density expansion of the osmotic pressure Pi of a monodisperse polymer solution in good-solvent conditions. Using the expected large-concentration behavior, we extrapolate the low-density expansion outside the dilute regime, obtaining the osmotic pressure for any concentration in the semidilute region. Comparison with field-theoretical predictions and experimental data shows that the obtained expression is quite accurate. The error is approximately 1%-2% below the overlap concentration and rises at most to 5%-10% in the limit of very large polymer concentrations.