THE ADSORPTION OF POLYMERS ON SOLIDS FROM SOLUTIONS.
POLYTECHNIC INST OF BROOKLYN N Y DEPT OF CHEMISTRY
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Results are given of measurements of the thickness of adsorbed polymer films of the densities of the polymer in such films. Polymer-solvent systems used were polymethyl methacrylate in benzene polyvinyl acetate in benzene and in methyl ethyl ketone and polystyrene in benzene, cylohexane, and mixtures of the two. Film thicknesses were found to vary directly with solvent power. Film densities of the polar polymers were found to be directly proportional to coil density. The film density of the high molecular weight fractions of polystyrene was independent of coil density and also had a temperature dependence, at all M.W. fractions, not exhibited by the other polymers.