Ring-opening Polymerization of Benzo-fused Thiolactones toward Chemically Recyclable Semi-aromatic Polythioesters

Wei Xiong; Kun Li; Long-Hai Liu; Si-Qi Wang; Zhong-Zheng Cai; Jian-Bo Zhu

doi:10.1007/s10118-025-3372-0

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Ring-opening Polymerization of Benzo-fused Thiolactones toward Chemically Recyclable Semi-aromatic Polythioesters

RESEARCH ARTICLE | Updated：2025-07-14

- Ring-opening Polymerization of Benzo-fused Thiolactones toward Chemically Recyclable Semi-aromatic Polythioesters
- Ring-opening Polymerization of Benzo-fused Thiolactones toward Chemically Recyclable Semi-aromatic Polythioesters
- 高分子科学（英文） 2025年43卷第6期页码：973-980
- Affiliations：
  
  National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), College of Chemistry, Sichuan University, Chengdu 610064, China
- Author bio：
  
  zzcai@scu.edu.cn (Z.Z.C.)
  jbzhu@scu.edu.cn (J.B.Z.)
- Funds：
  
  This work was financially supported by the National Key R&D Program of China (No. 2021YFA1501700), the National Natural Science Foundation of China (Nos. 22371194 and 22301197), and Fundamental Research Funds from Sichuan University (Nos. 2023SCUNL103 and 2024SCUQJTX005). We would like to thank Peng-Chi Deng from the Analytical & Testing Center of Sichuan University, as well as Dongyan Deng and Jing Li from the College of Chemistry at Sichuan University for compound testing.;Electronic supplementary information (ESI), including experimental section, analytical data, NMR spectral data, and polymerization data, is available free of charge in the online version of this article at http://doi.org/10.1007/s10118-025-3372-0.
- DOI：10.1007/s10118-025-3372-0
  中图分类号：
- 收稿日期：2025-04-16，
  
  修回日期：2025-04-29，
  
  录用日期：2025-05-02，
  
  网络出版日期：2025-05-20，
  
  纸质出版日期：2025-05-20
- Accepted：
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Xiong, W.; Li, K.; Liu, L. H.; Wang, S. Q.; Cai, Z. Z.; Zhu, J. B. Ring-opening polymerization of benzo-fused thiolactones toward chemically recyclable semi-aromatic polythioesters. Chinese J. Polym. Sci. 2025, 43, 973–980

Wei Xiong, Kun Li, Long-Hai Liu, et al. Ring-opening Polymerization of Benzo-fused Thiolactones toward Chemically Recyclable Semi-aromatic Polythioesters[J]. Chinese journal of polymer science, 2025, 43(6): 973-980.
Xiong, W.; Li, K.; Liu, L. H.; Wang, S. Q.; Cai, Z. Z.; Zhu, J. B. Ring-opening polymerization of benzo-fused thiolactones toward chemically recyclable semi-aromatic polythioesters. Chinese J. Polym. Sci. 2025, 43, 973–980 DOI： 10.1007/s10118-025-3372-0.

Wei Xiong, Kun Li, Long-Hai Liu, et al. Ring-opening Polymerization of Benzo-fused Thiolactones toward Chemically Recyclable Semi-aromatic Polythioesters[J]. Chinese journal of polymer science, 2025, 43(6): 973-980. DOI： 10.1007/s10118-025-3372-0.

摘要

A benzo-fusion strategy was implemented to ε-thiocaprolactone

fulfilling three robust benzo-fused thiolactones. Efficient and well-controlled ring-opening polymerization of these benzo-fused monomers delivered semi-aromatic polythioesters with excellent chemical recyclability and tunable material performance

which represent promising candidates for the next generation of high-performance recyclable materials.

Abstract

Chemically recyclable polythioesters are of particular interest owing to their unique properties and desired sustainability. By the exploit of a benzo-fusion strategy to

-thiocaprolactone

we successfully improved the chemical recyclability and regulated the thermal and mechani

cal properties of the resulting polythioesters. The efficient ring-opening polymerization (ROP) of benzo-fused thiolactone monomers (

) containing different substituents gave rise to high-molecular-weight semi-aromatic polythioesters P(

)s. The resulting P(

)s showcased tunable physical and mechanical properties. The debenzylation of P(

) was able to generate P(

-OH) with free hydroxyl sidechains. Notably

chemical recycling of the resulting P(

)s back to their corresponding monomers

via

bulk thermal depolymerization achieved high efficiency (

95% yield

99% purity)

establishing a closed-loop lifecycle.

关键词

Keywords

references

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