title: Phase separation in an exactly solvable model binary solution with three-body interactions and intermolecular bonding.
abstract: A model is presented in which the bonds of a honeycomb lattice are covered by rodlike molecules of types AA and BB, molecular ends near a common site having both three-body interactions and orientation-dependent bonding between two A molecular ends and between an A and a B molecular end. Phase diagrams corresponding to the separation into AA-rich and BB-rich phases are calculated exactly. Depending on the relative strengths of the interactions, one of several qualitatively different types of phase diagrams can result, including diagrams containing phenomena such as a double critical point or two separate asymmetric closed loops. The model is essentially a limiting case of a previously considered ternary solution model, and it is equivalent to a two-component system of interacting A and B molecules on the sites of a kagomé lattice.
authors.affiliation: Department of Chemistry, Texas Christian University, Fort Worth, Texas 76129, USA.
authors.forename: Radu P
authors.initials: RP
authors.lastname: Lungu
authors.forename: Dale A
authors.initials: DA
authors.lastname: Huckaby
authors.forename: Florin D
authors.initials: FD
authors.lastname: Buzatu