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The role of steric effects in the adsorption of chemically similar probes to a poly(methyl methacrylate) surface
Author(s) -
Jacob Pauline,
Arola Darren,
Berg John
Publication year - 1994
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1994.070510415
Subject(s) - steric effects , adsorption , inverse gas chromatography , methyl methacrylate , gibbs free energy , chemistry , polymer chemistry , adduct , steric factor , methacrylate , surface energy , computational chemistry , organic chemistry , thermodynamics , copolymer , polymer , physics
The role of steric effects in the adsorption of chemically similar acidic probes to the model basic surface of poly(methyl methacrylate) (PMMA) was examined using the technique of inverse gas chromatography (IGC). The results were expressed in terms of the acid‐base contribution to the Gibbs free‐energy change upon adsorption. The acid‐base component of the adsorption free energy, computed on the basis of theoretical modes of adduct formation, was found to depend strongly on the molecular structure of the adsorbate, suggesting the importance of steric effects. © 1994 John Wiley & Sons, Inc.