Statistical Theory of Associating Polymer Solutions: Interfacial Properties
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The interfacial structure formed in thermoreversible associating polymer solutions is studied within the density functional approach based on Flory's arguments of tree-like configurations of cluster associations. The unique characteristics of the interfacial region can be described in terms of the monomer density along the interface. For a certain value of the association parameter, which controls thermoreversible chemical reaction between associating functional groups, the density profile is not smooth and undergoes a sudden jump at the point where the number of bonded functional groups is small. Analytical expression for the interfacial tension is given and results of numerical calculations are presented.