Structural Manipulation of Aminal-crosslinked Polybutadiene for Recyclable and Healable Elastomers

Zheng-Hai Tang; Hui Zeng; Si-Qi Wei; Si-Wu Wu; Bao-Chun Guo

doi:10.1007/s10118-021-2626-8

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Structural Manipulation of Aminal-crosslinked Polybutadiene for Recyclable and Healable Elastomers

ARTICLE | Updated：2021-08-04

- Structural Manipulation of Aminal-crosslinked Polybutadiene for Recyclable and Healable Elastomers
- Chinese Journal of Polymer Science Vol. 39, Issue 10, Pages: 1337-1344(2021)
- Affiliations：
  
  Department of Polymer Materials and Engineering, South China University of Technology, Guangzhou 510640, China
- Author bio：
  
  mszhtang@scut.edu.cn (Z.H.T)
  psbcguo@scut.edu.cn (B.C.G)
- Funds：
- DOI：10.1007/s10118-021-2626-8
  CLC： M
- Received：19 May 2021，
  
  Revised：2021-6-25，
  
  Accepted：28 June 2021，
  
  Online First：04 August 2021，
  
  Published：20 August 2021
- Accepted：
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Tang, Z. H.; Zeng, H.; Wei, S. Q.; Wu, S. W.; Guo, B. C. Structural manipulation of aminal-crosslinked polybutadiene for recyclable and healable elastomers. Chinese J. Polym. Sci. 2021, 39, 1337–1344

Zheng-Hai Tang, Hui Zeng, Si-Qi Wei, et al. Structural Manipulation of Aminal-crosslinked Polybutadiene for Recyclable and Healable Elastomers[J]. Chinese Journal of Polymer Science, 2021, 39(10): 1337-1344.
Tang, Z. H.; Zeng, H.; Wei, S. Q.; Wu, S. W.; Guo, B. C. Structural manipulation of aminal-crosslinked polybutadiene for recyclable and healable elastomers. Chinese J. Polym. Sci. 2021, 39, 1337–1344 DOI： 10.1007/s10118-021-2626-8.

Zheng-Hai Tang, Hui Zeng, Si-Qi Wei, et al. Structural Manipulation of Aminal-crosslinked Polybutadiene for Recyclable and Healable Elastomers[J]. Chinese Journal of Polymer Science, 2021, 39(10): 1337-1344. DOI： 10.1007/s10118-021-2626-8.

摘要

Abstract

Recently

increasingly growing efforts have been devoted to incorporating dynamic covalent bonds into covalently crosslinked networks to address the persistent trade-offs between chemical crosslinking and malleability. Herein

a series of dynamic aminal bond crosslinked polybutadiene rubbers (PAPB) are prepared by crosslinking aldehyde group-terminated polybutadiene rubber (APB) with piperazine. By varying the molecular weight of APB

the crosslinking density of PAPB is changed

which offers the platform to regulate the mechanical characteristics and dynamic properties. Specially

with the decrease of APB molecular weight

i.e

. with the increase of crosslinking density

the modulus of PAPB gradually increases while the elongation at break conversely decreases

and the activation energy for network rearrangement initially decreases and then increases. The resultant PAPB exhibit vitrimer-like behaviors that can alter the network topologies at elevated temperatures without the loss of structural integrity through dissociative aminal exchange reactions

while the protic source can accelerate aminal dissociation and result in network dissolution even at room temperature. Due to the aminal exchange

PAPB are thermally malleable and can almost restore the original mechanical characteristics after recycling; besides

they are capable of healing at a relatively low crosslinking density.

关键词

Keywords

references

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