Journal of Polymer Science Polymer Symposia · 1984 · 11 citations · 7 references
Natural SciencesChemistryMaterials ScienceInterface ScienceSurface ChemistrySurface ScienceAdsorption At InterfacesAdsorption ProcessesAdsorptive SeparationsCoatingsSurface AdsorptionSurface PhysicsAdsorbent CharacterizationAdsorption ChemistryAdsorption IsothermsCompetitive AdsorptionParticle Surface PropertiesPolymer AdsorptionSurface Adsorption IsothermsSurface Pressure
Abstract The adsorption of poly(vinyl butyral) (PVB) at the γ‐Fe 2 O 3 –benzene interface and the air–water interface was investigated by means of the adsorbance on γ‐Fe 2 O 3 and surface pressure (π)–area (A) curves. The adsorption isotherms of PVB on γ‐Fe 2 O 3 from the various solvents are of the Langmuir type and can be explained by competitive adsorption between PVB and the solvents. From the π– A curves of monolayers and the adsorbance on γ‐Fe 2 O 3 , it was confirmed that the adsorbed PVB on γ‐Fe 2 O 3 is in a train‐loop conformation with the hydroxyl groups and the butyral segments directed toward the solution phase. The packing density of γ‐Fe 2 O 3 , particles in the magnetic coatings preferentially depends on the conformation of polymers on the particle surface. The PVB–solvent system which gives the most compact train‐loop conformation gives the highest dispersion and packing of γ‐Fe 2 O 3 in the magnetic coatings.
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