We determine the second, third, and fourth virial coefficients appearing in the density expansion of the osmotic pressure 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.
Virial coefficients and osmotic pressure in polymer solutions in good-solvent conditions / S. Caracciolo, B.M. Mognetti, A. Pelissetto. - In: THE JOURNAL OF CHEMICAL PHYSICS. - ISSN 0021-9606. - 125:9(2006 Sep 07), pp. 094903.094903-1-094903.094903-8.
Titolo: | Virial coefficients and osmotic pressure in polymer solutions in good-solvent conditions | |
Autori: | CARACCIOLO, SERGIO (Primo) MOGNETTI, BORTOLO MATTEO (Secondo) | |
Parole Chiave: | Macromolecular and polymer solutions ; Polymer melts ; Swelling ; Physical properties of polymers | |
Settore Scientifico Disciplinare: | Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici | |
Data di pubblicazione: | 7-set-2006 | |
Rivista: | ||
Tipologia: | Article (author) | |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1063/1.2338913 | |
Appare nelle tipologie: | 01 - Articolo su periodico |