INTERACTION OF POLY(OXYETHYLENE GLYCOL) WITH CYCLOHEXANE PENTANOL SODIUM DODECYL-SULFATE WATER-IN-OIL MICROEMULSIONS

The interaction of poly(oxyethylene glycol) (MW 6000) with cyclohexane/1-pentanol/sodium dodecyl sulfate microemulsions was studied with dynamic light scattering and luminescence probing techniques. Some conductivity measurements have also been made. Particular weight has been given to luminescence. We have chosen to analyze luminescence decay profiles by using models obtained from the theory of random walk in fractal domains, in order to deal with percolation phenomena present in the above system and to underline new information obtained by fractal models. Ru(bpy)3(2+) has been used as the lumophore and Fe(CN)6(3-) as the quencher. It was found that the polymer induces a structural reorganization of the dispersed phase so that the aggregates grow in size. The geometry of the dispersed phase becomes more restricted in the presence of polymer and the quenching efficiency decreases. The electric conductivity undergoes a limited decrease.