Degradable and Recyclable Polyesters from Multiple Chain Length Bio- and Waste-Sourceable Monomers.
Degradable and Recyclable Polyesters from Multiple Chain Length Bio- and Waste-Sourceable Monomers.
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来自多种链长生物和废物来源单体的可降解和可回收聚酯。
DOI：
10.1002/anie.202310729
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发表时间：
2023
影响因子：
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通讯作者：
Stefan Mecking
中科院分区：
文献类型：
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作者：
Taylor F. Nelson;Dario Rothauer;Michael Sander;Stefan Mecking
来源于废物或生物质的单体通常是不同链长的混合物;例如，聚乙烯废物的催化氧化产生二羧酸（DCA）的混合物。然而，由这样的单体混合物合成的聚酯很少被研究。我们报告基于多个线性脂肪族DCA的聚酯，存在于其中心和范围不同的链长分布中。我们证明，这些材料可以采用高密度聚乙烯类固态结构，并具有延展性（例如Et 610 MPa），允许注塑成型，或薄膜和纤维挤出。聚酯的熔点和结晶点没有显示出奇偶效应，因为偶极子不能有利地在晶体中排列，类似于传统的奇数碳数的长链DCA聚酯。13 C-标记的聚酯在土壤中的生物降解研究显示快速矿化，和解聚甲醇分解表明适合闭环循环。
Monomers sourced from waste or biomass are often mixtures of different chain lengths; e.g. catalytic oxidation of polyethylene waste yields mixtures of dicarboxylic acids (DCAs). Yet, polyesters synthesized from such monomer mixtures have rarely been studied. We report polyesters based on multiple linear aliphatic DCAs, present in chain length distributions that vary in their centers and ranges. We demonstrate that these materials can adopt high-density polyethylene-like solid state structures, and are ductile (e.g. Et 610 MPa), allowing for injection molding, or film and fiber extrusion. Melting and crystallization points of the polyesters show no odd-even effects as dipoles cannot favorably align in the crystal, similar to traditional odd carbon numbered, long-chain DCA polyesters. Biodegradation studies of 13C-labelled polyesters in soil reveal rapid mineralization, and depolymerization by methanolysis indicates suitability for closed-loop recycling.