title: Surface and bulk interchange energy in binary mixtures of chain molecules.
abstract: The interchange (interaction) parameter, controlling the phase behaviour of a binary mixture, is determined for the bulk and the surface of binary mixtures of different types of chain molecules, using surface tensiometry and a mean-field theory. For all mixtures and concentrations studied an identical behaviour is observed at the surface, depending only on the square of the reduced chain length mismatch delta n/n, where delta n and dealta n are the difference in and average of the number of carbons of the two components.
authors.affiliation: Department of Physics, Bar-Ilan University, Ramat-Gan 52900, Israel.
authors.forename: E
authors.initials: E
authors.lastname: Sloutskin
authors.forename: E B
authors.initials: EB
authors.lastname: Sirota
authors.forename: O
authors.initials: O
authors.lastname: Gang
authors.forename: X Z
authors.initials: XZ
authors.lastname: Wu
authors.forename: B M
authors.initials: BM
authors.lastname: Ocko
authors.forename: M
authors.initials: M
authors.lastname: Deutsch
mesh_terms: D000438:Alcohols / Q000737:chemistry; D001703:Biophysics / Q000379:methods*; D002244:Carbon / Q000737:chemistry; D019277:Entropy; D013499:Surface Properties; D013696:Temperature; D013816:Thermodynamics
chemical_list: D000438:Alcohols; D002244:Carbon