Accounting for differential swelling in the multi-physics modelling of the diffusive behaviour of polymers

The purpose of this paper is to take into account the derivative by moisture content of polymer volume in order to establish a diffusion law within the so‐called “thermodynamical approach” for a polymer material which experiences a hygro‐mechanical load. In this study, the specific case corresponding to the existence of unsymmetrical hygroscopic boundary conditions was investigated. The purpose of this paper is to take into account the derivative by moisture content of polymer volume in order to establish a diffusion law within the so‐called “thermodynamical approach” for a polymer material which experiences a hygromechanical load. In this study, the specific case corresponding to the existence of unsymmetrical hygroscopic boundary conditions was investigated.