The Adsorption of Polyethylene Glycol on the Suspended Silver Iodide

Abstract

The adsorption of polyethylene glycol from solution on the surface of suspended silver iodide has been studied by means of the measurement of the electrophoresis of silver iodide sols in the presence of polyethylene glycol having various molecular weight ranging from 200 to 9000. The charge densities of the silver iodide sols containing polyethylen glycol were estimated from their electriphoretic mobilities, and the adsorption was discussed from the changes in the charge densities by the application of Simha's theory on polymer adsorption. From the result of the discussion, it became clear that the polyethylene glycol molecule adsorbs on the surface of silver iodide with three segments for molecular weight of 9000, two segments for molecular weight of 2000 and one segment for molecular weight of 1500, respectively.