Chapter 12: Chain Dynamics in Polymer Liquids Check Access

Four different scenarios of polymer segment dynamics are described and compared: freely draining polymer chains, entangled polymer melts, pore-confined polymers and partial ordering of non-mesogenic polymers. Field-cycling NMR relaxometry, the dipolar correlation effect and Monte Carlo simulations verify key predictions of Rouse and reptation theories over a wide range of frequencies and times. Discrepancies with the model concepts are analyzed.