Surface characterization and study of Langmuir films of

Ligia Gargallo, Beatriz Miranda, Hernán Ríos, Fernando González-Nilo, Deodato Radi

Resultado de la investigación: Contribución a una revistaArtículo

12 Citas (Scopus)

Resumen

The surface behaviour of poly(4-vinylpyridine)s (P4VP) quaternized with four different alkyl chains (pentyl, hexyl, octyl and decy bromide) were studied. Surface pressure-area isotherms (π-A) at the air-water interface were determined. Depending on the length of the side-chains, the π-A isotherms show a plateau region. An extensive plateau is observed for n>6. The plateau pressures are similar for n=8 and n=10. The monolayers are stable and exhibit hysteresis phenomena. Brewster angle microscopy (BAM) is used to monitor the monolayer topography of the polymer on the water subphase. To obtain information about the surface energy (SE) and the degree of hydrophobicity of these systems, we have estimated the critical surface tension, γc, and the dispersion force and polar contributions to SE, γD and γp, respectively, by measurements of the contact angle (CA) of water and bromobenzene on the polymer surface. The results obtained are depend on the length of the alkyl lateral chain of the functionalized polymers.

Idioma originalInglés
Páginas (desde-hasta)858-862
Número de páginas5
PublicaciónPolymer International
Volumen50
N.º8
DOI
EstadoPublicada - ago 2001

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  • Polímeros y plásticos

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