Volume 63, Issue 13 e202400196
Communication

Torsional Strain Enabled Ring-Opening Polymerization towards Axially Chiral Semiaromatic Polyesters with Chemical Recyclability

Qing Cao

Qing Cao

National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), College of Chemistry, Sichuan University, 29 Wangjiang Rd, Chengdu, 610064 P. R. China

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Yi-Min Tu

Yi-Min Tu

National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), College of Chemistry, Sichuan University, 29 Wangjiang Rd, Chengdu, 610064 P. R. China

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Hua-Zhong Fan

Hua-Zhong Fan

National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), College of Chemistry, Sichuan University, 29 Wangjiang Rd, Chengdu, 610064 P. R. China

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Si-Yi Shan

Si-Yi Shan

National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), College of Chemistry, Sichuan University, 29 Wangjiang Rd, Chengdu, 610064 P. R. China

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Prof. Zhongzheng Cai

Corresponding Author

Prof. Zhongzheng Cai

National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), College of Chemistry, Sichuan University, 29 Wangjiang Rd, Chengdu, 610064 P. R. China

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Prof. Jian-Bo Zhu

Corresponding Author

Prof. Jian-Bo Zhu

National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), College of Chemistry, Sichuan University, 29 Wangjiang Rd, Chengdu, 610064 P. R. China

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Dedicated to Professor Yong Tang on the occasion of his 60th birthday.
First published: 14 February 2024
Citations: 12

Graphical Abstract

To overcome the non-polymerizability of the biaryl-fused monomer DBO, a cyclic ester Me-DBO installed with dimethyl substitution was prepared to enable its polymerizability via enhancing torsional strain while preserving an excellent recyclability. Remarkably, mixing these complementary enantiopure polymers containing axial chirality promoted a transformation from amorphous to crystalline material.

Abstract

The development of new chemically recyclable polymers via monomer design would provide a transformative strategy to address the energy crisis and plastic pollution problem. Biaryl-fused cyclic esters were targeted to generate axially chiral polymers, which would impart new material performance. To overcome the non-polymerizability of the biaryl-fused monomer DBO, a cyclic ester Me-DBO installed with dimethyl substitution was prepared to enable its polymerizability via enhancing torsional strain. Impressively, Me-DBO readily went through well-controlled ring-opening polymerization, producing polymer P(Me-DBO) with high glass transition temperature (Tg >100 °C). Intriguingly, mixing these complementary enantiopure polymers containing axial chirality promoted a transformation from amorphous to crystalline material, affording a semicrystalline stereocomplex with a melting transition temperature more than 300 °C. P(Me-DBO) were capable of depolymerizing back to Me-DBO in high efficiency, highlighting an excellent recyclability.

Data Availability Statement

The data that support the findings of this study are available in the supplementary material of this article.

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