A recently developed Multilayer Quasichemical Model (MQM) [1] extends Smirnova’s theory of a nonuniform solution near a flat solid wall [2] to fluid interfaces of varying geometry. Pair correlations between interacting functional groups of the molecules are described within the Guggenheim quasichemical approximation; the propagation of molecular chains in the fluid is described as a random walk, renormalized locally in every direction by the system geometry (planar, spherical or cylindrical) and by the competition for accommodation between the chain’s segment and other species. MQM gives very detailed structural description, including spatial distributions of monomeric
molecules and chain’s segments, the profiles of orientations of the chemical bonds along the chainlike molecules, the local orientations of different functional groups and orientations of hydrogen bonds in a multicomponent nonuniform fluid.