An Interfacial Dynamic Crosslinking Approach toward Catalyst-free and Mechanically Robust Elastomeric Vitrimer with a Segregated Structure

Yong Zhu; Jing-Li Gao; Lin-Jun Zhang; Yan Peng; Hao Wang; Fang-Wei Ling; Guang-Su Huang; Jin-Rong Wu

doi:10.1007/s10118-020-2479-6

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An Interfacial Dynamic Crosslinking Approach toward Catalyst-free and Mechanically Robust Elastomeric Vitrimer with a Segregated Structure

ARTICLE | Updated：2020-09-02

- An Interfacial Dynamic Crosslinking Approach toward Catalyst-free and Mechanically Robust Elastomeric Vitrimer with a Segregated Structure
- Chinese Journal of Polymer Science Vol. 39, Issue 2, Pages: 201-210(2021)
- Affiliations：
  
  State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China
- Author bio：
  
  wujinrong@scu.edu.cn
- Funds：
- DOI：10.1007/s10118-020-2479-6
  CLC：
- Received：19 May 2020，
  
  Revised：2020-7-4，
  
  Accepted：09 July 2020，
  
  Online First：02 September 2020，
  
  Published：02 January 2021
- Accepted：
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Zhu, Y.; Gao, J. L.; Zhang, L. J.; Peng, Y.; Wang, H.; Ling, F. W.; Huang, G. S.; Wu, J. R. An interfacial dynamic crosslinking approach toward catalyst-free and mechanically robust elastomeric vitrimer with a segregated structure. Chinese J. Polym. Sci. 2021, 39, 201–210

Yong Zhu, Jing-Li Gao, Lin-Jun Zhang, et al. An Interfacial Dynamic Crosslinking Approach toward Catalyst-free and Mechanically Robust Elastomeric Vitrimer with a Segregated Structure[J]. Chinese Journal of Polymer Science, 2021, 39(2): 201-210.
Zhu, Y.; Gao, J. L.; Zhang, L. J.; Peng, Y.; Wang, H.; Ling, F. W.; Huang, G. S.; Wu, J. R. An interfacial dynamic crosslinking approach toward catalyst-free and mechanically robust elastomeric vitrimer with a segregated structure. Chinese J. Polym. Sci. 2021, 39, 201–210 DOI： 10.1007/s10118-020-2479-6.

Yong Zhu, Jing-Li Gao, Lin-Jun Zhang, et al. An Interfacial Dynamic Crosslinking Approach toward Catalyst-free and Mechanically Robust Elastomeric Vitrimer with a Segregated Structure[J]. Chinese Journal of Polymer Science, 2021, 39(2): 201-210. DOI： 10.1007/s10118-020-2479-6.

摘要

Abstract

Elastomeric vitrimers with covalent adaptable networks are promising candidates to overcome the intrinsic drawbacks of conventional covalently-crosslinked elastomers; however

most elastomeric vitrimers show poor mechanical properties and require the addition of exogenous catalysts. Herein

we fabricate a catalyst-free and mechanically robust elastomeric vitrimer by constructing a segregated structure of sodium alginate (SA) in the continuous matrix of epoxidized natural rubber (ENR)

and further crosslinking the composite by exchangeable hydroxyl ester bonds at the ENR-SA interfaces. The manufacturing process of the elastomeric vitrimer is facile and environmentally friendly without hazardous solvents or exogenous catalysts

as the abundant hydroxyl groups of the segregated SA phase can act as catalyst to activate the crosslinking reaction and promote the dynamic transesterification reaction. Interestingly

the segregated SA structure bears most of the load owing to its high modulus and small deformability

and thus ruptures preferentially upon deformation

leading to efficient energy dissipation. Moreover

the periodic stiffness fluctuation between rigid segregated SA phase and soft ENR matrix is beneficial to the crack-resisting. As a result

the elastomeric vitrimer manifests exceptional combination of catalyst-free

defect-tolerance

high tensile strength and toughness. In addition

the elastomeric vitrimer also exhibits multi-shape memory behavior which may further broaden its applications.

关键词

Keywords

references

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