The micellar formation and the micellar structure of poly (ethylene oxide)/poly (propylene oxide)/poly (ethylene oxide) triblock copolymer, pluronic P-85, in aqueous solution were investigated in terms of surface tension, fluorometric analysis, static and dynamic light scattering measurements.
Two clear discontinuities corresponding to the cmc
I (at a low concentration) and cmc
II (at a high concentration) were found in the relationship between the surface tension and P-85 concentration. Monomolecular micelles were found at cmc
I while polymolecular micelles appeared at cmc
II. Furthermore the average number of micelle aggregation, the micellar size and the micellar shape varied greatly with changing in the P-85 concentration.
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