Reptation and Contour-Length Fluctuations in Melts of Linear Polymers
- 20 July 1998
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 81 (3), 725-728
- https://doi.org/10.1103/physrevlett.81.725
Abstract
We present an analytical theory of stress relaxation in monodisperse linear polymer melts that contains contributions from both reptation and contour-length fluctuations, modeled as in our previous work on arm retraction in star polymers. Our approach resolves two long-standing problems with reptation theory: it predicts a zero-shear viscosity scaling as over a broad range in chain length before reaching an asymptotic dependence, and a power law in the dynamic loss modulus with depending on chain length, in agreement with experiment.
Keywords
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