Publication Title

Physical Review Letters

Publication Date

6-8-1992

Document Type

Article

DOI

10.1103/PhysRevLett.68.3436

Keywords

Surfactant Micelles, Neutron Scattering, Water, System, Phase

Disciplines

Physics

Abstract

We studied the effect of polyethylene-oxide (PEO, molecular weight from 10(5) to 4 x 10(6)) dissolved in the micellar nematic (N) and lamellar (L) phases of the surfactant system cesium perfluoro-octanoate (CsPFO)/water by microscopy and calorimetry. Replacement of water by PEO suppresses the lamellar phase above a critical concentration (w(c)) which depends on the molecular weight of the polymer by a power law. In a limited range below w(c) a reentrant nematic is observed. The N-L transitions become less sharp with increasing concentration. The observed effects are due to the disruption of the lamellar order by the polymer.

Comments

Copyright 1992 American Physical Society. Available on publisher's site at http://dx.doi.org/10.1103/PhysRevLett.68.3436.


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