Sliding Dynamics of Slide-Ring Polymers Based on the Bead-Spring Model

Zhong-Qiang Xiong; Wei Yu

doi:10.1007/s10118-023-2967-6

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Sliding Dynamics of Slide-Ring Polymers Based on the Bead-Spring Model

RESEARCH ARTICLE | Updated：2023-08-24

- Sliding Dynamics of Slide-Ring Polymers Based on the Bead-Spring Model
- Chinese Journal of Polymer Science Vol. 41, Issue 9, Pages: 1410-1424(2023)
- Affiliations：
  
  Advanced Rheology Institute, Department of Polymer Science and Engineering, State Key Laboratory for Metal Matrix Composite Materials, Shanghai Jiao Tong University, Shanghai 200240, China
- Author bio：
  
  wyu@sjtu.edu.cn
- Funds：
- DOI：10.1007/s10118-023-2967-6
  CLC：
- Received：31 December 2022，
  
  Revised：2023-2-1，
  
  Accepted：06 February 2023，
  
  Online First：23 March 2023，
  
  Published：01 September 2023
- Accepted：
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Xiong, Z. Q.; Yu, W. Sliding dynamics of slide-ring polymers based on the bead-spring model. Chinese J. Polym. Sci. 2023, 41, 1410–1424

Zhong-Qiang Xiong, Wei Yu. Sliding Dynamics of Slide-Ring Polymers Based on the Bead-Spring Model[J]. Chinese Journal of Polymer Science, 2023, 41(9): 1410-1424.
Xiong, Z. Q.; Yu, W. Sliding dynamics of slide-ring polymers based on the bead-spring model. Chinese J. Polym. Sci. 2023, 41, 1410–1424 DOI： 10.1007/s10118-023-2967-6.

Zhong-Qiang Xiong, Wei Yu. Sliding Dynamics of Slide-Ring Polymers Based on the Bead-Spring Model[J]. Chinese Journal of Polymer Science, 2023, 41(9): 1410-1424. DOI： 10.1007/s10118-023-2967-6.

摘要

The local direction-dependent constraint defines a sliding constraint. Both the diffusion behaviors of chain segments and the evolution of the mean conformation of the whole chain in the response to external stimuli can be captured quantitatively by the present sliding ring model.

Abstract

Understanding the sliding dynamics is critical for developing rotaxane-based mechanically interlocked polymers. In this work

we studied the sliding behavior of a sliding ring and its influence on the dynamics of attached polymer chains based on the heterogeneous bead-spring model. The sliding constraint was treated as direction-related confinement with the heterogeneous friction coefficient and constraint intensity. The relaxation spectrum

the diffusion dynamics

and the sliding dynamics under/after drag were studied for typical sliding chain topologies

namely

the sliding dangling chain

the constraint sliding chain

and the sliding strand. Compared with the non-sliding chains (such as the free chain

the dangling chain

and the network strand)

the slide of one or two chain ends induces an additional slow process in the transition from the Rouse-type behavior to the long-time terminal behavior. The effect of the sliding-related process on the diffusion of specific chain segments relies on the chain topology. The slow sliding relaxation process is also observed in the sliding process during and after chain deformation

whose characteristic time is at least three times the terminal relaxation time of the free chain with the same length

and will increase with the friction coefficient (

i.e.

the interaction) between the ring and the polymer axial. The results of this work will benefit the understanding of the sliding dynamics in experiments.

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