Dynamically Heterogeneous Relaxation of Entangled Polymer Chains

Physical Review Letters
Yuecheng Zhou, Charles M Schroeder

Abstract

Stress relaxation following deformation of an entangled polymeric liquid is thought to be affected by transient reforming of chain entanglements. In this work, we use single molecule techniques to study the relaxation of individual polymers in the transition regime from unentangled to entangled solutions. Our results reveal the emergence of dynamic heterogeneity underlying polymer relaxation behavior, including distinct molecular subpopulations described by a single-mode and a double-mode exponential relaxation process. The slower double-mode timescale τ_{d,2} is consistent with a characteristic reptation time, whereas the single-mode timescale τ_{s} and the fast double-mode timescale τ_{d,1} are attributed to local regions of transient disentanglement due to deformation.

References

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May 2, 2006·Proceedings of the National Academy of Sciences of the United States of America·Rae M RobertsonDouglas E Smith
May 21, 2013·Nano Letters·Melikhan Tanyeri, Charles M Schroeder
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Apr 2, 2016·Proceedings of the National Academy of Sciences of the United States of America·Anish ShenoyCharles M Schroeder

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Citations

Apr 3, 2020·Polymers·Anna F KatsarouVlasis G Mavrantzas
Apr 17, 2019·Nature Communications·Yuecheng ZhouCharles M Schroeder
Jul 25, 2019·Physical Review. E·Charles D YoungCharles E Sing
Nov 15, 2019·Designed Monomers and Polymers·Meng-Di ChenWen-Xing Chen
Jan 16, 2021·The Journal of Chemical Physics·Neha Tyagi, Binny J Cherayil
Sep 20, 2019·Macromolecules·Hsiao-Ping Hsu, Kurt Kremer

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