Solid state rheology of polymer films and layers: Influence of the thickness on mechanical properties of a PU-adhesive between metallic substrate

Abstract

Dynamic mechanical measurements on polymer layers between metallic substrate show a dependence of the mechanical properties on the thickness of the polymer layer. This is discussed on the example of a polyurethane adhesive between gold substrates. Measurements of the shear modulus show a decrease of the glass transition temperature with increasing the thickness of the polymer layer. This behavior can be described by an empirical equation.