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Pyrene-labeled hydrophobically modified polyanions were prepared by terpolymerization of sodium 2-(acrylamido)-2-methylpropanesulfonate, N-dodecylmethacrylamide (2.5−7.5 mol %), and N-(1-pyrenylmethyl)methacrylamide (1 mol %). Dynamic interactions of these polymers with mixed micelles of n-dodecyl hexa(oxyethylene) glycol monoether (C12E6), cetyltrimethylammonium chloride (CTAC), and cetylpyridinium chloride (CPC) (quencher for pyrene fluorescence) were monitored by fluorescence quenching. The charge on the micelle was varied systematically by varying the mole fraction of CTAC (Y) in the mixed micelle. All quenching experiments were performed at Y < Yp, where Yp is a critical Y at which the polymer−micelle systems undergo macroscopic phase separation. A kinetic model was developed to estimate the binding constant (K) (where K = k1/k-1), association rate constant (k1), and lifetime of bound micelle on the polymer (residence time) (1/k-1) from steady-state and time-dependent fluorescence-quenching data. Thi...

Interaction of Pyrene-Labeled Hydrophobically Modified Polyelectrolytes with Oppositely Charged Mixed Micelles Studied by Fluorescence Quenching