Insights into substitution strategy towards thermodynamic and property regulation of chemically recyclable polymers

Yi-Min Tu, Fu-Long Gong, Yan-Chen Wu, Zhongzheng Cai () and Jian-Bo Zhu ()
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Yi-Min Tu: Sichuan University
Fu-Long Gong: Sichuan University
Yan-Chen Wu: Sichuan University
Zhongzheng Cai: Sichuan University
Jian-Bo Zhu: Sichuan University

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: Abstract The development of chemically recyclable polymers serves as an attractive approach to address the global plastic pollution crisis. Monomer design principle is the key to achieving chemical recycling to monomer. Herein, we provide a systematic investigation to evaluate a range of substitution effects and structure−property relationships in the ɛ-caprolactone (CL) system. Thermodynamic and recyclability studies reveal that the substituent size and position could regulate their ceiling temperatures (Tc). Impressively, M4 equipped with a tert-butyl group displays a Tc of 241 °C. A series of spirocyclic acetal-functionalized CLs prepared by a facile two-step reaction undergo efficient ring-opening polymerization and subsequent depolymerization. The resulting polymers demonstrate various thermal properties and a transformation of the mechanical performance from brittleness to ductility. Notably, the toughness and ductility of P(M13) is comparable to the commodity plastic isotactic polypropylene. This comprehensive study is aimed to provide a guideline to the future monomer design towards chemically recyclable polymers.

Date: 2023
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DOI: 10.1038/s41467-023-38916-5

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