Membrane osmometer for use at moderate applied pressures

• Published in: Journal of polymer science. Part B, Polymer physics Vol. 41; no. 23; pp. 3064 - 3069
• Main Authors: Moses, Corey L., Rebelo, Luis Paulo N., Van Hook, W. Alexander
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 01.12.2003
• Subjects: osometry; pressure dependence; second virial coefficient
• ISSN: 0887-6266; 1099-0488
• DOI: 10.1002/polb.10623

A membrane osmometer designed for use at pressures greater than 0.1 MPa and less than 6 MPa was employed to determine the pressure coefficient of the equilibrium osmotic pressure (∂π/∂P) of a dilute polystyrene/toluene solution. The pressure coefficient of the second virial coefficient (∂A2/∂P), calculated from ∂π/∂P, was 6 (±4) × 10−5 cm3 mol g−2 MPa−1, which was in reasonable agreement with the value obtained from pressure‐dependent light scattering. © 2003 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 41: 3064–3069, 2003