A recently derived theoretical equation of state for linear polymers in monolayers is applied to experimental measurements of the dependence of surface area on surface pressure for monolayers of poly(methyl methacrylate) and polypropylene grafted with methyl acrylate, at water/air, water/n-hexane, water/toluene, and water/(petroleum ether) interfaces at 20°, 25° and 30°C. The experimental and theoretical curves are in satisfactory agreement for pressures up to those corresponding to the limiting area for stability of the monolayers. The theoretical parameters derived from the experimental data measure the molecular and intermolecular properties that determine the Gibbs free energies of the monolayers.
Petroleum Ether Surface Pressure Methyl Acrylate Theoretical Equation Average Molar Mass
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