title: Polymer-solvent interaction parameters in polymer solutions at high polymer concentrations.
abstract: Molecular mass and temperature dependences of the polymer-solvent interaction parameter have been investigated in the extreme interval of high polymer concentration using inverse gas chromatography (IGC). The observed molecular mass dependence has been compared with the predictions of a theoretical model, which emphasises the role of intramolecular contacts in the polymer chain. The model reproduces reasonably well the molecular mass dependence. However, enthalpic and entropic contributions of the interaction parameter, obtained from IGC measurements at different temperatures, exhibit behaviours difficult to explain in the framework of the current models.
authors.affiliation: Polymer Science and Technology Department and Institute for Polymer Materials, University of the Basque Country, San Sebastian, Spain.
authors.forename: C
authors.initials: C
authors.lastname: Etxabarren
authors.forename: M
authors.initials: M
authors.lastname: Iriarte
authors.forename: C
authors.initials: C
authors.lastname: Uriarte
authors.forename: A
authors.initials: A
authors.lastname: Etxeberría
authors.forename: J J
authors.initials: JJ
authors.lastname: Iruin
mesh_terms: D002849:Chromatography, Gas / Q000379:methods*; D011108:Polymers / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry*
chemical_list: D011108:Polymers; D012997:Solvents