Main-Chain Ketone Installation in Polyethylene Chains: A Metal-Free Strategy toward Photodegradable Plastics.

IF 15.6 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Journal of the American Chemical Society Pub Date : 2025-10-02 DOI:10.1021/jacs.5c09943

Shilin Cui,Zhipeng Lu,Jaqueline C Lopez,Moritz Kränzlein,Christopher J Kim,Song Lin,Anne M LaPointe,Geoffrey W Coates

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引用次数: 0

Abstract

Polyethylene with in-chain isolated ketones is an attractive target for achieving photodegradability while maintaining polyolefin material properties. This work reports a method to functionalize post-consumer polyethylene through radical C-H activation to install TEMPO functionalities and subsequent oxidation to obtain in-chain isolated ketones without compromising the polymer molecular weights. This process does not require metals, catalysts, or expensive reagents and allows tunable ketone incorporation up to 3 mol %. The thermal and mechanical properties were investigated to demonstrate that the ketone-containing polyethylene could potentially work as a photodegradable alternative of existing polyethylene. Photodegradation of the ketone-containing polyethylene reveals a clear decrease in molecular weights and suggests random installation of functionalities. This approach enables the conversion of post-consumer polyethylene into ketone functionalized materials through simple chemical transformations.

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主链酮在聚乙烯链上的安装：光降解塑料的无金属策略。

在保持聚烯烃材料性能的同时，具有链内分离酮的聚乙烯是实现光降解的一个有吸引力的目标。这项工作报告了一种通过自由基C-H活化来实现消费后聚乙烯功能化的方法，以安装TEMPO功能，随后氧化以获得链内分离酮，而不会影响聚合物的分子量。这个过程不需要金属，催化剂，或昂贵的试剂，并允许可调的酮掺入高达3mol %。热性能和力学性能的研究表明，含酮聚乙烯有潜力作为现有聚乙烯的光降解替代品。含酮聚乙烯的光降解揭示了分子量的明显减少，并表明功能的随机安装。这种方法可以通过简单的化学转化将消费后的聚乙烯转化为酮功能化材料。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of the American Chemical Society 化学-化学综合

CiteScore

24.40

自引率

6.00%

发文量

2398

审稿时长

1.6 months

期刊介绍： The flagship journal of the American Chemical Society, known as the Journal of the American Chemical Society (JACS), has been a prestigious publication since its establishment in 1879. It holds a preeminent position in the field of chemistry and related interdisciplinary sciences. JACS is committed to disseminating cutting-edge research papers, covering a wide range of topics, and encompasses approximately 19,000 pages of Articles, Communications, and Perspectives annually. With a weekly publication frequency, JACS plays a vital role in advancing the field of chemistry by providing essential research.