Inverse gas chromatography has been used for the determination of the glass transition temperatures of amorphous polymers and the thermodynamic functions for adsorption of n-alkanes (C-7 to C-10), n-butanol, di-n-butyl ether and 1,4-dioxane in the Henry region onto the surface of polystyrene, styrene-nonyl methacrylate (4:1) copolymer, and styrene-maleic anhydride-methacrylic acid (1:1:1) and styrene-nonyl methacrylate (4:1) with 2 wt% p-phthalimidinoxymethacrylic acid terpolymers. The data were compared with the thermodynamic functions of test solutes in polymer solution at infinite dilution. The influence of modification of polymer structure on the ability of polymer functional groups to interact with non-polar, donor or acceptor molecules of sorbates or solvents has been established.