关键词: 废弃聚烯烃, 升级回收, 氧化裂解, 动态化学, 类聚烯烃材料

Abstract:

Polyolefins constitute over half of global plastic production, and their disposal has led to severe "white pollution" and microplastic issues. Researching the chemical recycling of polyolefin wastes to achieve resource recovery and upcycling is of significant importance. However, as typical carbon-chain polymers, the cracking of polyolefins involves high temperatures, substantial energy consumption, uncontrollable chain scission, product separation challenges, high decontamination costs and low value, making large-scale engineering difficult. It reviewed the innovative advancements in the field of polyolefin oxidative cracking recycling and circular utilization. The outlook included new upcycling processes, specifically the preparation of functionalized oligomers through low-temperature controlled cracking of polyolefin wastes. By employing dynamic chemistry to extend chain lengths of multi-phase and multi-component macromolecular monomers, the aim was to customize polyolefin-like materials. This approach aimed to transform waste polymers into high-value polymers. Furthermore, it emphasized the importance of developing new and sustainable technologies to address plastic pollution and to advance the polyolefin industry. The proposed strategies for the upcycling and recycling of polyolefins held significant scientific and practical value in promoting a sustainable plastics economy.

Key words: polyolefin wastes, upcycling, oxidative cracking, dynamic chemistry, polyolefin-like materials