The influence of sodium salicylate (NaSal) concentration on the linear micelle formation in an aqueous solution of cetyltrimethylammonium bromide (CTAB) is investigated by the frequency-domain electric birefringence relaxation spectroscopy (FEB method). The contour length L of linear micelles is found to increase with increasing NaSal concentration Cs but for further increase of Cs in excess of the CTAB concentration, L decreases, i.e., linear micelles break into shorter pieces. The FEB result indicates also that the diffusion constant of salicylate ions bound to a linear micelle is nearly independent of Cs with an average value smaller than that of free salicylate ions.
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Oizumi et al. (1996) studied this question.
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