Diffusion at Polymer/Polymer Interface

Abstract

Since neutron reflectometry has a superior depth resolution in a few Å scale, it is suitable for a precise investigation of a polymer/polymer interface. If time evolution of an interfacial thickness can be evaluated by neutron reflectivity measurements, it is possible to clarify mobility or dynamics at a polymer/polymer interface. In this article, we explain the interdiffusion of polystyrene/deuterated polystyrene bilayer films as a typical example of diffusion phenomenon of polymer chains examined by neutron reflectivity. We also describe sample preparation and data analyses for beginners.