From Zero to Hero: Polymer Upcycling through Transformation of Waste PET Thermoforms into Kevlar.

IF 4.4 2区 化学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
ACS Applied Polymer Materials Pub Date : 2025-04-24 eCollection Date: 2025-05-09 DOI:10.1021/acsapm.5c00191
Elanna P Neppel, Richard-Joseph L Peterson, Lars Peereboom, John R Dorgan
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引用次数: 0

Abstract

Polyethylene terephthalate (PET) is a widely used plastic packaging material that is often discarded after use. Previous studies have used recovered terephthalic acid derivatives to produce poly(p-phenyleneterephthalamide) (PPTA), an expensive commodity scale polymer widely known by the trade name Kevlar. Here, PPTA is synthesized using carbon that is 100% recovered from waste PET. To do so, the monomer p-phenylenediamine (PPD) is obtained through two facile "one-pot" reactions: (1) ammonolysis of PET to yield terephthalamide and (2) conversion of terephthalamide to PPD through a Hofmann type of rearrangement. Following earlier works, hydrolysis of PET followed by chlorination provides the monomer, terephthaloyl chloride (TCl). PPTA is synthesized by reacting the monomers in a solution of n-methyl pyrrolidone and calcium chloride. The pathway is demonstrated using zero-valued waste "clamshell" PET, a material usually excluded from recycling streams. The material reuse results in a lifesaving polymer used by members of the military, police, and other first-responders. It is concluded that this pathway provides an economic means of recovering and reusing waste PET that can reduce dependence on nonrenewable resources and foster greater material circularity in the plastics industries.

从零到英雄:通过将废弃PET热塑型转化为凯夫拉尔的聚合物升级回收。
聚对苯二甲酸乙二醇酯(PET)是一种广泛使用的塑料包装材料,使用后经常被丢弃。以前的研究已经使用回收的对苯二甲酸衍生物生产聚(对苯基对苯二甲酸)(PPTA),这是一种昂贵的商品规模聚合物,广为人知的商品名称是凯夫拉。在这里,PPTA是用100%从废弃PET中回收的碳合成的。为此,单体对苯二胺(PPD)通过两个简单的“一锅”反应得到:(1)PET氨解生成对苯二甲酰胺,(2)对苯二甲酰胺通过霍夫曼式重排转化为PPD。根据早期的研究,PET的水解和氯化反应提供了单体,对苯二甲酰氯(TCl)。通过在n-甲基吡咯烷酮和氯化钙溶液中反应,合成了PPTA。该途径使用零价值废物“翻盖”PET进行演示,这种材料通常被排除在回收流之外。这种材料的再利用产生了一种拯救生命的聚合物,被军队、警察和其他急救人员使用。结论是,这一途径提供了一种回收和再利用废弃PET的经济手段,可以减少对不可再生资源的依赖,并促进塑料工业中更大的材料循环。
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
CiteScore
7.20
自引率
6.00%
发文量
810
期刊介绍: ACS Applied Polymer Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics, and biology relevant to applications of polymers. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates fundamental knowledge in the areas of materials, engineering, physics, bioscience, polymer science and chemistry into important polymer applications. The journal is specifically interested in work that addresses relationships among structure, processing, morphology, chemistry, properties, and function as well as work that provide insights into mechanisms critical to the performance of the polymer for applications.
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