Polymer cosolvent system-II. Preferential adsorption of binary solvent acetone/cyclohexane by poly(p-tert-butylphenyl methacrylate)

The cosolvent system poly(p-tert butylphenyl methacrylate) (3)/acetone(1)/cyclohexane (2) has been studied at 298 K by light scattering, refractive index increment of dialysis equilibrium and viscometry. The preferential adsorption coefficient, λ*, for the whole composition range of the binary mixture acetone (1)/cyclohexane(2) has been determined. The values have been compared with the theoretically calculated values. The results indicate that in this system it is necessary to take into account the tertiary interaction parameters χ₁₂₃, χ₁₂₂ and χ₂₃₃.