One-Pot Synthesis of Depolymerizable δ-Lactone Based Vitrimers,Advanced Materials

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One-Pot Synthesis of Depolymerizable δ-Lactone Based Vitrimers
Advanced Materials ( IF 27.4 ) Pub Date : 2023-04-15 , DOI: 10.1002/adma.202300954
Liang Yue ₁ , Yong-Liang Su ₂ , Mingzhe Li ₁ , Luxia Yu ₁ , S Macrae Montgomery ₁ , Xiaohao Sun ₁ , M G Finn ₂ , Will R Gutekunst ₂ , Rampi Ramprasad ₃ , H Jerry Qi _{1,

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Affiliation

A depolymerizable vitrimer that allows both reprocessability and monomer recovery by a simple and scalable one-pot two-step synthesis of vitrimers from cyclic lactones is reported. Biobased δ-valerolactone with alkyl substituents (δ-lactone) has low ceiling temperature; thus, their ring-opening-polymerized aliphatic polyesters are capable of depolymerizing back to monomers. In this work, the amorphous poly(δ-lactone) is solidified into an elastomer (i.e., δ-lactone vitrimer) by a vinyl ether cross-linker with dynamic acetal linkages, giving the merits of reprocessing and healing. Thermolysis of the bulk δ-lactone vitrimer at 200 °C can recover 85–90 wt% of the material, allowing reuse without losing value and achieving a successful closed-loop life cycle. It further demonstrates that the new vitrimer has excellent properties, with the potential to serve as a biobased and sustainable replacement of conventional soft elastomers for various applications such as lenses, mold materials, soft robots, and microfluidic devices.

中文翻译：

一锅法合成可解聚δ-内酯基Vitrimer

据报道，一种可解聚的vitrimer，通过简单且可扩展的一锅两步从环内酯合成vitrimer，实现了可再加工性和单体回收。生物基带烷基取代的δ-戊内酯（ δ-内酯）上限温度低；因此，它们的开环聚合脂肪族聚酯能够解聚回单体。在这项工作中，无定形聚（δ-内酯）通过具有动态缩醛键的乙烯基醚交联剂固化成弹性体（即δ-内酯Vitrimer），具有再加工和修复的优点。大块δ-内酯玻璃体在 200 °C 下热解可回收 85-90 wt% 的材料，允许重复使用而不损失价值，并实现成功的闭环生命周期。它进一步表明，新型vitrimer具有优异的性能，有潜力作为传统软弹性体的生物基和可持续替代品，用于各种应用，如镜片、模具材料、软机器人和微流体设备。

更新日期：2023-04-15

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