Adsorption and contact angle studies: II. Water and organic substances on polished polytetrafluoroethylene☆

摘要: Abstract Ellipsometrically determined adsorption isotherms are reported for water, bromobenzene, nitro-methane, benzene, amyl, butyl, propyl, and ethyl alcohols, carbon tetrachloride, n -octane, -hexane on a polished polytetrafluoroethylene surface. These nonwetting systems, contact angles were also measured. In addition, two wetting tetrachloride oxide-coated stainless steel chromium-plated glass. For most of the cases, film pressure adsorbed was not negligible, should be omitted in semiempirical treatments angle. The may fitted by previously proposed potential-distortion model, choice parameters giving observed Alternatively, found to segments single characteristic isotherm Polanyi type thus obey corresponding state principle. This systems does fit data possibility is discussed that cases consists bulk-like liquid form micropatches or lenses rather than as uniform thickness.