Über eine beziehung zwischen verdünnungsentropie und verdünnungsenthalpie in lösungen von polystyrol und polymethylmethacrylat

The second osmotic virial coefficient A₂ and its entropic and enthalpic parts of athermal and exothermal solutions of polystyrene (PS) and polymethylmethacrylate (PMMA) were determined by light scattering measurements at 25°C and normal pressure. The intrinsic viscosity dependence on temperature was used to find athermal and exothermal solvents for these polymers. The investigated thermodynamical quantities A₂, A_2,S and A_2,H yield together with earlier measurements a correlation which is nearly independent of the special system.