近日，天津大学王彬团队实现了通过缩聚实现热稳定性和化学可回收性的地板温度调节聚醚醚酯-解聚-再聚合策略。相关论文于2026年1月21日发表在《德国应用化学》杂志上。

开发具有醚酯交替结构的新型聚醚酯，以平衡材料的可解聚性与热稳定性，对先进材料应用和可持续发展至关重要。当前研究主要聚焦于调控小环单体的上限温度，以提升聚醚酯在高温下的热稳定性。值得关注的是，通过大环醚酯单体的熵驱动开环聚合获得的下限温度调控型聚醚酯，其热力学稳定性随温度升高而自然增强。然而，由于大环单体合成效率与选择性极低，基于下限温度调控的高性能聚醚酯体系长期发展缓慢。

研究组提出了一种“缩聚-解聚”策略制备大环醚酯单体，并首次实现了兼具热稳定性、熔体加工性与化学可循环性的下限温度调控型聚醚酯。所得聚醚酯呈半结晶态且具有延展性，其热分解温度显著高于上限温度调控型聚（1,4-二氧杂环己烷-2-酮）（Td,5%达378.3?℃，而PPDO的Td,5%为238.4?℃）。该研究证实了下限温度调控策略在解决上限温度调控体系固有挑战方面的有效性，为设计高性能聚醚酯提供了分子层面的设计原则。

附：英文原文

Title: Floor Temperature-regulated Poly(ether-alt-ester) With Thermal Stability and Chemical Recyclability Enabled by Polycondensation—Depolymerization−Repolymerization Strategy

Author: Shiyu Guan, Mingqian Wang, Jingying Xiao, Zhiqiang Ding, Bin Wang

Issue&Volume: 2026-01-21

Abstract: Creating innovative poly(ether-alt-ester)s (PEAEs) with alternating ether and ester groups to address the trade-offs between the polymer′s depolymerizability and thermostability is essentially important for advanced material applications and sustainable development. Current research efforts focus on modulating the ceiling temperature (Tc) of monomers with small-sized rings, to increase the thermostability of PEAEs at high temperature. Notably, floor temperature (Tf)regulated PEAEs, obtained from entropy-driven ring-opening polymerization (ROP) of macrocyclic ether-ester monomers, inherently exhibit enhanced thermodynamic stability as the temperature increases. However, high-performance PEAEs regulated by Tf remains long-term underdeveloped owing to extremely low efficiency and selectivity in macrocyclic monomer synthesis. Herein, we developed a “polycondensation–depolymerization” strategy for macrocyclic ether-ester monomer and presented the first example of Tf-regulated PEAE with thermostability, melt processibility as well as chemical recyclability. The resulting PEAE is semi-crystalline and ductile, and exhibits remarkable high decomposition temperature (with a Td,5% up to 378.3 °C) compared to the Tc-regulated poly(1,4-dioxan-2-one) (PPDO, Td,5% = 238.4 °C). This work corroborated the effectiveness of the Tf-regulated PEAE in resolving the challenges associated with the Tc-regulated analogs and provided a molecular-level design principle for poly(ether-alt-ester) with high-performance.

DOI: 10.1002/anie.202522383

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202522383