J. Phys. IV France
Volume 129, October 2005
Page(s) 25 - 28

J. Phys. IV France 129 (2005) 25-28

DOI: 10.1051/jp4:2005129006

Monomer exchange and critical dynamics of nonionic surfactant/water systems

J. Haller and U. Kaatze

Drittes Physikalisches Institut, Georg-August-Universität, Bürgerstr. 42-44, Göttingen, Germany

Ultrasonic attenuation spectra between 100 kHz and 2 GHz are discussed for various C $_{\rm i}\rm E_{\rm j}$/water mixtures. A relaxation term representing the monomer exchange of the micellar solutions, another one reflecting the local fluctuations in amphiphile concentration, and additional terms due to elementary molecular processes such as conformational isomerizations are identified. Parameters of these terms are briefly discussed and indications are presented for a fluctuation controlled monomer exchange mechanism.

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