NMR Observation of Entangled Polymer Dynamics: Tube Model Predictions and Constraint Release

Author(s): Fabián Vaca Chávez and Kay Saalwächter
We use a benchtop NMR technique to monitor entangled polymer melt dynamics over 5 decades in time covering regimes II–IV of the tube model. We confirm the familiar molar mass scaling exponents of the regime transitions, but we observe a mass-dependent time scaling exponent describing segmental flu…

[Phys. Rev. Lett. 104, 198305] Published Wed May 12, 2010