Linear Polymers in Networks: Swelling, Diffusion, and Interdigitation

Abstract

The diffusion of polymers within heterogeneous media is strongly dependent on the structure of the medium. We review neutron reflectometry and ion beam analysis measurements on (crosslinked) polystyrene films. In particular we consider the diffusion of polymers into and within polymer networks, and consider experiments to determine information on the structure of networks by swelling in their own homopolymer. Finally, we discuss the interpenetration of networks by linear polymer and polymer brushes.