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解聚的热力学与动力学：是什么让乙烯基单体再生成为可能？

The thermodynamics and kinetics of depolymerization: what makes vinyl monomer regeneration feasible?

作者信息

Lohmann Victoria, Jones Glen R, Truong Nghia P, Anastasaki Athina

机构信息

Laboratory of Polymeric Materials, Department of Materials, ETH Zürich Vladimir-Prelog-Weg 5 8093 Zürich Switzerland

Monash Institute of Pharmaceutical Sciences, Monash University 399 Royal Parade Parkville VIC 3152 Australia.

出版信息

Chem Sci. 2023 Dec 5;15(3):832-853. doi: 10.1039/d3sc05143a. eCollection 2024 Jan 17.

DOI:10.1039/d3sc05143a
PMID:38239674
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10793647/
Abstract

Depolymerization is potentially a highly advantageous method of recycling plastic waste which could move the world closer towards a truly circular polymer economy. However, depolymerization remains challenging for many polymers with all-carbon backbones. Fundamental understanding and consideration of both the kinetics and thermodynamics are essential in order to develop effective new depolymerization systems that could overcome this problem, as the feasibility of monomer generation can be drastically altered by tuning the reaction conditions. This perspective explores the underlying thermodynamics and kinetics governing radical depolymerization of addition polymers by revisiting pioneering work started in the mid-20th century and demonstrates its connection to exciting recent advances which report depolymerization reaching near-quantitative monomer regeneration at much lower temperatures than seen previously. Recent catalytic approaches to monomer regeneration are also explored, highlighting that this nascent chemistry could potentially revolutionize depolymerization-based polymer recycling in the future.

摘要

解聚可能是一种极具优势的塑料废物回收方法，它能使世界更接近真正的循环聚合物经济。然而，对于许多具有全碳主链的聚合物而言，解聚仍然具有挑战性。为了开发能够克服这一问题的有效新型解聚系统，对动力学和热力学的基本理解与考量至关重要，因为通过调整反应条件，单体生成的可行性可能会发生巨大变化。这篇综述文章通过回顾20世纪中叶开始的开创性工作，探讨了加成聚合物自由基解聚背后的热力学和动力学，并展示了其与近期令人兴奋的进展之间的联系，这些进展报道了解聚在比以前更低的温度下实现了近乎定量的单体再生。还探讨了近期单体再生的催化方法，强调这种新兴化学在未来可能会彻底改变基于解聚的聚合物回收。

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