Stress-Structure Relationship of the Reversible Associating Polymer Network under Start-up Shear Flow

Ai-Qing Liu; Li-Jun Liu; Wen-Sheng Xu; Xiao-Lei Xu; Ji-Zhong Chen; Li-Jia An

doi:10.1007/s10118-020-2487-6

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Stress-Structure Relationship of the Reversible Associating Polymer Network under Start-up Shear Flow

ARTICLE | Updated：2020-09-30

- Stress-Structure Relationship of the Reversible Associating Polymer Network under Start-up Shear Flow
- Chinese Journal of Polymer Science Vol. 39, Issue 3, Pages: 387-396(2021)
- Affiliations：
  
  a.College of Chemistry, Jilin University, Changchun 130012, China
  b.State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  c.University of Science and Technology of China, Hefei 230026, China
- Author bio：
  
  ljliu@ciac.ac.cn (L.J.L.)
  wsxu@ciac.ac.cn (W.S.X.)
  xlxu@ciac.ac.cn (X.L.X.)
  jzchen@ciac.ac.cn (J.Z.C.)
- Funds：
- DOI：10.1007/s10118-020-2487-6
  CLC：
- Received：15 June 2020，
  
  Revised：2020-7-21，
  
  Accepted：30 July 2020，
  
  Online First：30 September 2020，
  
  Published：02 January 2021
- Accepted：
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Liu, A. Q.; Liu, L. J.; Xu, W. S.; Xu, X. L.; Chen, J. Z.; An, L. J. Stress-structure relationship of the reversible associating polymer network under start-up shear flow. Chinese J. Polym. Sci. 2021, 39, 387–396

Ai-Qing Liu, Li-Jun Liu, Wen-Sheng Xu, et al. Stress-Structure Relationship of the Reversible Associating Polymer Network under Start-up Shear Flow[J]. Chinese Journal of Polymer Science, 2021, 39(3): 387-396.
Liu, A. Q.; Liu, L. J.; Xu, W. S.; Xu, X. L.; Chen, J. Z.; An, L. J. Stress-structure relationship of the reversible associating polymer network under start-up shear flow. Chinese J. Polym. Sci. 2021, 39, 387–396 DOI： 10.1007/s10118-020-2487-6.

Ai-Qing Liu, Li-Jun Liu, Wen-Sheng Xu, et al. Stress-Structure Relationship of the Reversible Associating Polymer Network under Start-up Shear Flow[J]. Chinese Journal of Polymer Science, 2021, 39(3): 387-396. DOI： 10.1007/s10118-020-2487-6.

摘要

Abstract

We adopt Langevin dynamics to explore the stress-structure relationship of telechelic reversible associating polymer gel during start-up shear flow

with shear strengths varying from

=12.6 to

=12640. At weak shear flow

=12.6

the shear stress proportionally increases with shear strain at short times

followed by a strain hardening behavior and then passes through a maximum (

max

) and finally decreases until it reaches the steady state. During the evolution of stress

the gel network is only slightly broken and essentially maintains its framework

and the strain hardening behavior originates from the excessive stretching of chains. On the other hand

the stress-strain curve at intermediate shear flow

=505.6 shows two differences from that at

=12.6

namely

the absence of strain hardening and a dramatic increase of stress at large strains

which is caused by the rupture of gel network at small strains and the network recovery at large strains

respectively. Finally

at very strong shear flow

=6319.7

the gel network is immediately broken by shear flow and the stress-strain curve exhibits similar behaviors to those of classical polymeric liquids.

关键词

Keywords

references

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