Direct Measurement of Energy Barriers on Rough and Heterogeneous Solid Surfaces

The "three-liquid" contact angle approach to the surface free energy components of solids was applied to poly (vinyl fluoride), rough and flattened, with and without flame treatment. Lifshitz-van der Waals (LW), γ LW SL , and acid-base (AB), γ LW SL , components were determined and used to...

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Veröffentlicht in:The Journal of adhesion 1997-06, Vol.63 (1-3), p.141-157
Hauptverfasser: Lloyd, Thomas B., Connelly, Guy M.
Format: Artikel
Sprache:eng
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Zusammenfassung:The "three-liquid" contact angle approach to the surface free energy components of solids was applied to poly (vinyl fluoride), rough and flattened, with and without flame treatment. Lifshitz-van der Waals (LW), γ LW SL , and acid-base (AB), γ LW SL , components were determined and used to calculate −δG SL (W adhesion SL ) for the formation of interfaces of five liquids with polymer. The automated goniometer allowed the determination of the energy barriers, −δ G* SL as the advancing liquid moved from pinned configuration to a metastable one. The acid-base component of the barriers was much greater than the LW, and the magnitude of the barriers was only slightly reduced by flattening.
ISSN:0021-8464
1545-5823
1563-518X
DOI:10.1080/00218469708015218