Polymer cosolvent system—II. Preferential adsorption of binary solvent acetone/cyclohexane by poly(p-tert-butylphenyl methacrylate) |
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| Authors: | L Gargallo D Radic IA Katime |
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| Institution: | 1. Instituto de Ciencias Químicas, Departamento de Físico Química, Pontificia Universidad Católica de Chile, Casilla 114-D, Santiago, Chile;2. Departamento de Química Física, Grupo de Propiedades Termodinámicas de Polímeros en Disolución, Facultad de Ciencias, Universidad de Bilbao, Apartado 644, Bilbao España |
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| Abstract: | 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, λ1, 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. |
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