Chemical Recycling of Polyolefins via Ring-Closing Metathesis Depolymerization
Chemical Recycling of Polyolefins via Ring-Closing Metathesis Depolymerization
复制标题
通过闭环易位解聚化学回收聚烯烃
DOI：
10.1039/d3cc05612k
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发表时间：
2024
影响因子：
4.9
通讯作者：
Sun, Hao
中科院分区：
文献类型：
--
作者：
Ibrahim, Tarek;Ritacco, Angelo;Nalley, Daniel;Emon, Omar Faruk;Liang, Yifei;Sun, Hao
目前对商品聚合物废物的回收利用不足，导致了我们现代社会迫切的环境和人类健康问题。在寻求下一代聚合物材料的过程中，化学家们最近将注意力转移到了可化学回收的聚合物的设计上，这种聚合物可以在温和的条件下解聚以再生单体。在过去的十年中，闭环歧化反应已被证明是聚烯烃解聚的一种强有力的方法，产生的低应变环烯烃产品可以重新聚合成新的聚合物批次。在这篇综述中，我们将重点介绍由闭环歧化解聚(RCMD)实现的聚烯烃化学循环利用的最新进展。可解聚聚烯烃的资料库将根据其单体或解聚产物的环大小而被涵盖，包括五元环、六元环、八元环和大环环。此外，还将讨论RCMD方法的当前限制、潜在的应用和未来的机会。从这一领域的最新研究可以清楚地看出，RCMD代表着一种强有力的策略，可以实现新型聚烯烃材料的闭环化学回收。
The current insufficient recycling of commodity polymer waste has resulted in pressing environmental and human health issues in our modern society. In the quest for next-generation polymer materials, chemists have recently shifted their attention to the design of chemically recyclable polymers that can undergo depolymerization to regenerate monomers under mild conditions. During the past decade, ring-closing metathesis reactions have been demonstrated to be a robust approach for the depolymerization of polyolefins, producing low-strain cyclic alkene products which can be repolymerized back to new batches of polymers. In this review, we aim to highlight the recent advances in chemical recycling of polyolefins enabled by ring-closing metathesis depolymerization (RCMD). A library of depolymerizable polyolefins will be covered based on the ring size of their monomers or depolymerization products, including five-membered, six-membered, eight-membered, and macrocyclic rings. Moreover, current limitations, potential applications, and future opportunities of the RCMD approach will be discussed. It is clear from recent research in this field that RCMD represents a powerful strategy towards closed-loop chemical recycling of novel polyolefin materials.