Exploring Nonlinear Rheological Behaviors in Entangled Semi-flexible Polymer Melts

Li-Cheng Ma; Yong-Jin Ruan; Zhen-Hua Wang; Yu-Yuan Lu; Li-Jia An

doi:10.1007/s10118-024-3162-0

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Exploring Nonlinear Rheological Behaviors in Entangled Semi-flexible Polymer Melts

RESEARCH ARTICLE | Updated：2024-11-04

- Exploring Nonlinear Rheological Behaviors in Entangled Semi-flexible Polymer Melts
- Chinese Journal of Polymer Science Vol. 42, Issue 11, Pages: 1811-1823(2024)
- Affiliations：
  
  a.State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  b.School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
- Author bio：
  
  yylu@ciac.ac.cn
- Funds：
- DOI：10.1007/s10118-024-3162-0
  CLC：
- Received：08 April 2024，
  
  Revised：2024-05-07，
  
  Accepted：13 May 2024，
  
  Online First：20 August 2024，
  
  Published：30 November 2024
- Accepted：
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Ma, L. C.; Ruan, Y. J.; Wang, Z. H.; Lu, Y. Y.; An, L. J. Exploring nonlinear rheological behaviors in entangled semi-flexible polymer melts. Chinese J. Polym. Sci. 2024, 42, 1811–1823

Li-Cheng Ma, Yong-Jin Ruan, Zhen-Hua Wang, et al. Exploring Nonlinear Rheological Behaviors in Entangled Semi-flexible Polymer Melts[J]. Chinese Journal of Polymer Science, 2024, 42(11): 1811-1823.
Ma, L. C.; Ruan, Y. J.; Wang, Z. H.; Lu, Y. Y.; An, L. J. Exploring nonlinear rheological behaviors in entangled semi-flexible polymer melts. Chinese J. Polym. Sci. 2024, 42, 1811–1823 DOI： 10.1007/s10118-024-3162-0.

Li-Cheng Ma, Yong-Jin Ruan, Zhen-Hua Wang, et al. Exploring Nonlinear Rheological Behaviors in Entangled Semi-flexible Polymer Melts[J]. Chinese Journal of Polymer Science, 2024, 42(11): 1811-1823. DOI： 10.1007/s10118-024-3162-0.

摘要

Using molecular dynamics simulation

we investigate the nonlinear rheological behavior of semi-flexible entangled polymer melts. Our findings show a notable stress overshoot phenomenon at specific shear rates

along with the observation of rare metastable states

indicated by a dual-plateau pattern in the shear stress-strain curve.

Abstract

This study utilizes molecular dynamics simulation to investigate the complex dynamics of entangled semi-flexible polymer melts. The investigation reveals a significant stress overshoot phenomenon in the systems

demonstrating the intricate interplay between shear rates

chain orientation

and chain stretching dynamics. Additionally

the identification of metastable states

characterized by

a dual-plateau phenomenon in the shear stress-strain curve at specific Rouse-Weissenberg number

showcases the system’s responsiveness to external perturbations and its transition to stable shear banding states. Moreover

the analysis of flow field deviations uncovers a progression of shear bands with increasing

displaying distinct behaviors in the system’s dynamics under different shear rates and chain lengths. These findings challenge established theoretical frameworks and advocate for refined modelling approaches in polymer rheology research.

关键词

Keywords

references

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