✦ LIBER ✦

Rigid dipole orientation at fluid interfaces—role of the dielectric constants, of the relaxation and of the co-operativity

✍ Scribed by A. Sanfeld; A. Steinchen

Publisher: Elsevier Science
Year: 1991
Tongue: English
Weight: 255 KB
Volume: 36
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(91)85033-4

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✦ Synopsis

Aim~et--The thermodynamics of interfacial dipole layers allows the demonstration of the role of the dielectric constants on the orientation affinity of dipoles at interfaces. A linear dependence of the difference of the affinities with the difference of the reverse mean dielectric constants is evidenced by comparing the orientation affinities of the same dipolar system towards two couples of different fluids. Surface relaxation and co-operative orientation induced by an electromechanical field are also discussed.

Experiments performed by L. Lavielle et ai. (CNRS Muihouse) on grafted polyethylene and polypropylene in different fiquids show good correlation with the theory.

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