Abstract
Studies are presented on the nonionic micellar systems hexaethylene (C 12 E 6 ) and octaethylene (C 12 E 8 ) glycol dodecyl ether in gels and solutions of κ-carrageenan. Aggregation numbers and size distributions of the micelles were studied with a fluorescence quenching method, while self-diffusion coefficients of the surfactants were determined with a tracer technique. It was found that the interaction between the surfactants and the polymers was repulsive, as revealed by a slight increase in micelle size in the presence of polymers
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