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- W2056597404 abstract "In systems of “homologous liquids” on a solid substrate at a constant temperature, the following correlation is found: cos θ = 1 + b (γc − γLV) where θ is the contact angle, b the slope, γc = γLV at θ = 0, and γLV the surface energy of the liquid. On the basis of this correlation, an equation has been derived for the surface energy of the substrate: γLV = (bγc + 1)2/4b. This equation is found to be applicable to a number of polymeric and ceramic substrates and the surface energy values thus obtained are in excellent agreement with literature values. The equation is expected to be equally applicable to metal substrates. The substrates discussed are polytetrafluoroethylene, n-hexatriacontane, paraffin, polyethylene, polystyrene, polyethylene terephthalate, nylon (6, 6), MgO, UO2 and BeO. The surface energy can be expressed by γS (ergs/cm2) = 20.25 − 0.62T (°C) for polytetrafluoroethylene above 30°C, and by γS (ergs/cm2) = 1140−0.28T (°C) for MgO. Dans les systèmes de “liquides homologues” déposés sur un substrat solide à une température constante, on trouve la corrélation suivante: cos θ = 1 + b (γc − γLV) où θ est l'angle de contact, b l'inclinaison, γc égale γLV pour θ=0 et γLV est l'énergie superficielle du liquide. A partir de cette corrélation une équation a été établie pour l'énergie de surface du substrat: γSV=(bγc+1)2/4b. On trouve que cette équation s'applique bien à un certain nombre de substrats en polymères et en céramiques. Les valeurs de l'énergie de surface obtenues ainsi sont en excellent accord avec les valeurs publiées dans la bibliographie. L'équation devrait s'appliquer aussi bien aux substrats métalliques. Les substrats examinés sont: le polytétrafluoréthylène, l'hexatriacontane n, la paraffine, le polyéthylène, le polystyrène, le térephtalate de polyéthylène, le nylon (6,6), MgO, UO2 et BeO. L'énergie de surface du polytétrafluoréthylène, au dessus de 30°C, peut être experimée par la relation γS (ergs/cm2) = 20,25−0,62T (°C) et celle de MgO par γS (ergs/cm2)=1140−0,28T (°C). Für Systeme “homologer Flüssigkeiten” auf einem festen Substrat konstanter Temperatur wurde die folgende Beziehung gefunden: cos θ=1+b (γc−γLV); dabei ist θ der Kontaktwinkel, b die Steigung und γLV die Oberflächenenergie der Flüssigkeit. Von dieser Beziehung ausgehend wurde eine Gleichung für die Oberflächenenergie des Substrats abgeleitet: γSV = (bγc+1)2/4b. Diese Gleichung kann man auf eine Reihe von Polymer- und Keramiksubstraten anwenden; die so gewonnenen Werte sind in sehr guter Übereinstimmung mit Literaturwerten. Diese Gleichung sollte für Metallsubstrate ebenfalls anwendbar sein. Es werden folgende Substrate diskutiert: Polytetrafluoräthylen, n-Hexatriacontan, Paraffin, Polyäthylen, Polystyrol, Polyäthylen-Tetraphthalat, Nylon (6,6), MgO, UO2 und BeO. Für Polytetrafluoräthylen kann man die Oberflächenenergie durch γS (ergs/cm2)=20,25−0,62T (°C) und für MgO durch γS (ergs/cm2)=1140−0,28T (°C) ausdrücken." @default.
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- W2056597404 date "1973-06-01" @default.
- W2056597404 modified "2023-09-25" @default.
- W2056597404 title "A method for determining surface energy of solids" @default.
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- W2056597404 doi "https://doi.org/10.1016/0025-5416(73)90121-3" @default.
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