Dynamics of bimodal polymer melts in the crossover-region from Rouse-to reptation-like behaviour-A study with NSE-spectroscopy

The single chain dynamics of bimodal saturated polybutadiene melts is addressed by neutron spin echo spectroscopy. A mode analysis of the structure factor provides an access to different relaxation modes (different spatial extension) separately. For the generalized Rouse model formulated by Hess an extension from monomodal to bimodal melts is presented.