Recyclable Polyurea-Urethane Thermosets with De-Crosslinking Capability in Acetic Acid

Xinglei Tao; Wentian Yi; Xiao-Qi Xu; Yapei Wang

doi:10.1007/s10118-022-2872-4

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Recyclable Polyurea-Urethane Thermosets with De-Crosslinking Capability in Acetic Acid

RESEARCH ARTICLE | Updated：2023-05-26

- Recyclable Polyurea-Urethane Thermosets with De-Crosslinking Capability in Acetic Acid
- Chinese Journal of Polymer Science Vol. 41, Issue 6, Pages: 859-865(2023)
- Affiliations：
  
  Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing 100872, China
- Author bio：
  
  xuxiaoqi@ruc.edu.cn (X.Q.X.)
  yapeiwang@ruc.edu.cn (Y.W.)
- Funds：
- DOI：10.1007/s10118-022-2872-4
  CLC： M
- Received：17 August 2022，
  
  Revised：2022-9-15，
  
  Accepted：17 September 2022，
  
  Online First：12 December 2022，
  
  Published：01 June 2023
- Accepted：
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Tao, X.; Yi, W.; Xu, X.-Q.; Wang, Y. Recyclable polyurea-urethane thermosets with de-crosslinking capability in acetic acid. Chinese J. Polym. Sci. 2023, 41, 859–865

Xinglei Tao, Wentian Yi, Xiao-Qi Xu, et al. Recyclable Polyurea-Urethane Thermosets with De-Crosslinking Capability in Acetic Acid[J]. Chinese Journal of Polymer Science, 2023, 41(6): 859-865.
Tao, X.; Yi, W.; Xu, X.-Q.; Wang, Y. Recyclable polyurea-urethane thermosets with de-crosslinking capability in acetic acid. Chinese J. Polym. Sci. 2023, 41, 859–865 DOI： 10.1007/s10118-022-2872-4.

Xinglei Tao, Wentian Yi, Xiao-Qi Xu, et al. Recyclable Polyurea-Urethane Thermosets with De-Crosslinking Capability in Acetic Acid[J]. Chinese Journal of Polymer Science, 2023, 41(6): 859-865. DOI： 10.1007/s10118-022-2872-4.

摘要

A novel kind of polyurea-urethane thermoset was reported with borate ester as its crosslinking point to enable controllable de-crosslinking. Such a thermoset presents remarkable mechanical properties and outstanding solvent resistance capability

due to its high crosslinking density. The de-crosslinked product can be reporcessed to generate a new thermoplastic material.

Abstract

Covalent crosslinking points within thermosets generally result in excellent mechanical properties and solvent resistance yet lead to limited degradability and recyclability. Those thermosets become degradable or recyclable if crosslinking points are cleavable or reversible. Following this principle

we report a kind of polyurea-urethane thermoset with borate ester as its crosslinking point to enable a controllable de-crosslinking in response to acetate acid. Such a thermoset presents remarkable mechanical properties as well as outstanding solvent resistance capability

due to the high crosslinking density and intermolecular hydrogen bonding. Furthermore

the de-crosslinked product can be reporcessed to generate a brand new thermoplastic material.

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references

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