Thermodynamic and hydrodynamic properties of aliphatic polyesters, 3. Analysis of osmotic and light scattering data of poly(β‐propiolactone) in 2,2,2‐trifuloroethanol in terms of a universal scaling law for the osmotic pressure in the excluded volume limit

Abstract

AbstractOsmotic and light scattering data of poly(β‐propiolactone) in 2,2,2‐trifluoroethanol, a thermodynamically very good solvent, are analyzed in terms of a universal scaling law for the osmotic pressure in the excluded volume limit. The polymolecularity correction function to calculate osmotic pressures from light scattering data is deduced and a numerical method to treat simultaneously all the measured osmotic pressures at different concentrations is developed. It is shown that, for a given concentration, provided the molecular weight of the polymer species together with its radius of gyration is known, the osmotic pressure of its dilute and semidilute solutions can be calculated.