Ultrasonic absorption studies of surfactant exchange between micelles and bulk phase in aqueous micellar solutions of nonionic surfactants with a short alkyl chain. 2. C6E3, C6E5, C8E4, and C8E8

Spectrofluorimetry (with pyrene as a probe), density and ultrasonic absorption measurements, and static and time-resolved fluorescence quenching have been used to obtain the critical micelle concentration (cmc), the isothermal volume change upon micellization and the micelle aggregation number N of the ethoxylated nonionic surfactants C 6 E 3 , C 6 E 5 , C 8 E 4 , and C 8 F 8 (tri- and penta(ethylene glycol) monohexyl ethers and tetra- and octa(ethylene glycol) monooctyl ethers, respectively)