Data di Pubblicazione:
2006
Citazione:
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.
Abstract:
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.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Macromolecular and polymer solutions ; Polymer melts ; Swelling ; Physical properties of polymers
Elenco autori:
S. Caracciolo, B.M. Mognetti, A. Pelissetto
Link alla scheda completa: