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Adsorption of polymers at the solution-solid interface

I. Polyvinyl acetate on glass

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Synopsis

The adsorption of polyvinyl acetate from solution onto glass powders was studied. The adsorption is independent of molecular weight and it can be said that polymer lies flat on the adsorbent surface. On the other hand, the extent of adsorption depends strongly upon the sort of the solvent in a manner which can be discussed with solubility parameter and size of the polymer coil in the solution. Good linear relation was obtained between maximum adsorption and difference of the solubility parameter between polymer and solvent. And also a straight line was obtained when specific volume of the polymer was plotted against maximum adsorption. Maximum adsorption decreases with increasing specific volume. It would be said that polymer is adsorbed on the solid surface with its occupied area which is proportional to the size of coil in the solution.

Zusammenfassung

Die Adsorption von Polyvinyl-Azetat als Lösung an Glaspulver wurde untersucht. Die Adsorption ist unabhängig vom Molekulargewicht, und man kann sagen, daß das Polymere flach auf der Adsorbens-Oberfläche liegt. Andererseits hängt das Ausmaß der Adsorption stark von der Art des Lösungsmittels in einer Weise ab, welche mit Hilfe von Lösungsmittelparametern und Gestalt des Polymerknäuels in der Lösung diskutiert werden kann. Gute lineare Beziehungen wurden zwischen der maximalen Adsorption und der Differenz der Lösungsmittel-Parameter zwischen Polymeren und Lösungsmittel gefunden. Und ebenfalls eine lineare Abhängigkeit wurde erhalten, wenn das spezifische Volumen des Polymeren gegen das Maximum der Adsorption aufgetragen wurde. Die maximale Adsorption nahm ab mit steigendem spezifischen Volumen. Man kann sagen, das Polymere wird an der festen Oberfläche adsorbiert und bedeckt eine Fläche, die proportional zur Größe des Knäuels in der Lösung ist.

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Author notes

  1. K. Mizuhara, K. Hara & T. Imoto

    Present address: Faculty of Engineering, Osaka City University, Sugimoto-cho, Sumiyoshi-ku, Osaka, Japan

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    1. K. Mizuhara
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    2. K. Hara
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    3. T. Imoto
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    Mizuhara, K., Hara, K. & Imoto, T. Adsorption of polymers at the solution-solid interface. Kolloid-Z.u.Z.Polymere 229, 17–21 (1969). https://doi.org/10.1007/BF01542500

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    • DOI: https://doi.org/10.1007/BF01542500

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