We review some results from the literature describing the structure and dynamics of polymer molecules adsorbed at liquid interfaces as well as their behavior in foams. The first part describes theoretical and experimental results concerning the structure and dynamics of model polymer systems, i.e. homopolymers and copolymers. In the second part, we review experimental results concerning mixtures of polymers and surfactants that are widely used to stabilize foams. In such mixtures, the surfactants and the polymer molecules form complexes in the bulk solution and at liquid interfaces which help stabilizing the foams. We review the physicochemical parameters that influence the adsorption dynamics and the viscoelastic properties of the interfaces as well as the foam properties of such mixtures. (C) 2014 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.