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Correction: Nonlinear rheology of entangled polymers at turning point

Shi-Qing Wang *
Morton Institute of Polymer Science and Engineering and Department of Polymer Science, University of Akron, Akron, Ohio 44325-3909, USA. E-mail: swang@uakron.edu

Received 26th June 2017 , Accepted 26th June 2017

First published on 13th July 2017


Correction for ‘Nonlinear rheology of entangled polymers at turning point’ by Shi-Qing Wang et al., Soft Matter, 2015, 11, 1454–1458.


This correction note acknowledges that the withdrawal of four articles1–4 has affected some statements made in ref. 5. Specifically, in the last paragraph of Section IV of ref. 5, the results of ref. 2 were applied to make an incorrect statement that there should be a chain stretching contribution to the macroscopic stress even for rates lower than the Rouse rate (i.e., WiR ≪ 1). The paragraph continued by repeating the erroneous conclusions from ref. 2 that (a) the shear stress overshoot originates from retraction of stretched chains on time scales longer than the Rouse time and (b) such a molecular dynamics simulation result does not support the tube model's premise that chain retraction occurs inside a tube on Rouse time.

To dispel any plausible confusion in the literature, we make a short comment. Although the contour length may be at its equilibrium value on the tube segment scale either during startup shear with WiR < 1 or after relaxation for a period as long as the Rouse time from fast (WiR ≫ 1) step strain, there is no reason that the stress can still be calculated based on tube segmental orientation. The molecular mechanism for stress overshoot during startup shear with WiR < 1 remains an open question.

The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.

References

  1. Y. Y. Lu, L. J. An, S. Q. Wang and Z. G. Wang, ACS Macro Lett., 2013, 2, 561–565 CrossRef CAS.
  2. Y. Y. Lu, L. J. An, S. Q. Wang and Z. G. Wang, ACS Macro Lett., 2014, 3, 569–573 CrossRef CAS.
  3. Y. Y. Lu, L. J. An, S. Q. Wang and Z. G. Wang, Macromolecules, 2014, 47, 5432–5435 CrossRef CAS.
  4. Y. Y. Lu, L. J. An, S. Q. Wang and Z. G. Wang, Macromolecules, 2015, 48, 4164–4173 CrossRef CAS.
  5. S.-Q. Wang, Soft Matter, 2015, 11, 1454–1458 RSC.

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