RHEOLOGY OF CONFINED POLYMER MELTS UNDER SHEAR-FLOW - STRONG ADSORPTION LIMIT

The dynamics of a confined polymer melt between strong adsorbing surfa ces is considered theoretically. In particular the influence of bridgi ng on the theological behavior is investigated. It is shown that the b ridges are very important for small enough shear velocities. Several r egimes of qualitatively different theological behavior depending on th e shear velocity are predicted, one of;the intermediate regimes being characterized by a power law decrease of the shear stress as a functio n of the velocity.