2024-03-19T05:58:39Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00031025
2023-01-16T04:24:31Z
320:321:322
Primitive chain network simulations for the interrupted shear response of entangled polymeric liquids
Masubuchi, Yuichi
Doi, Yuya
Uneyama, Takashi
open access
viscoelasticity
polymers
molecular simulation
The non-linear viscoelastic response under interrupted shear flows is one of the interesting characteristics of entangled polymers. In particular, the stress overshoot in the resumed shear has been discussed concerning the recovery of the entanglement network in some studies. In this study, we performed multichain slip-link simulations to observe the molecular structure of an entangled polymer melt. After confirming the reasonable reproducibility of our simulation with the literature data, we analyzed the molecular characteristics following the decoupling approximation. We reasonably found that the segment orientation dominates the stress overshoot even under the resumed shear with minor contributions from the segment stretch and entanglement density. We defined the mitigation function for the recovery of the stress overshoot as a function of the rest time and compared it with the relaxation of the molecular quantities after the initial shear. As a result, we have found that the mitigation of the stress overshoot coincides with the relaxation of entanglement density.
ファイル公開:2021/07/28
Royal Society of Chemistry
2020-07-28
eng
journal article
AM
http://hdl.handle.net/2237/00033208
https://nagoya.repo.nii.ac.jp/records/31025
https://doi.org/10.1039/D0SM00654H
1744-683X
Soft Matter
16
28
6654
6661
https://nagoya.repo.nii.ac.jp/record/31025/files/PCN_interrupted_v4.pdf
application/pdf
977.4 kB
2021-07-28