{"title":"High Carbon Recovery in Photocatalytic Degradation of High-Density Polyethylene (HDPE): Blend with Stearic Acid as a Radical Source","authors":"Bin Lu, Kohei Takahashi, Kyoko Nozaki","doi":"10.1021/acsmacrolett.4c00726","DOIUrl":null,"url":null,"abstract":"A blend of high-density polyethylene (HDPE, <i>M</i><sub>w</sub> = 59.4 kDa) and stearic acid was efficiently degraded under cerium catalyzed photodecarboxylation conditions, and the molecular weight decreased to <i>M</i><sub>w</sub> = ∼5 kDa. The reaction proceeds at 100 °C in <i>tert</i>-butylnitrile (<sup><i>t</i></sup>BuCN) in air, where HDPE does not dissolve or swell. The products are solid material with >90% weight recovery of the starting HDPE + stearic acid. Control experiments supported that carbon radicals generated by cerium-catalyzed photodecarboxylation of stearic acid transferred to the main chain of the HDPE, which undergoes oxidative degradation to lower the molecular weight.","PeriodicalId":18,"journal":{"name":"ACS Macro Letters","volume":"62 1","pages":""},"PeriodicalIF":5.1000,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Macro Letters","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1021/acsmacrolett.4c00726","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
引用次数: 0
Abstract
A blend of high-density polyethylene (HDPE, Mw = 59.4 kDa) and stearic acid was efficiently degraded under cerium catalyzed photodecarboxylation conditions, and the molecular weight decreased to Mw = ∼5 kDa. The reaction proceeds at 100 °C in tert-butylnitrile (tBuCN) in air, where HDPE does not dissolve or swell. The products are solid material with >90% weight recovery of the starting HDPE + stearic acid. Control experiments supported that carbon radicals generated by cerium-catalyzed photodecarboxylation of stearic acid transferred to the main chain of the HDPE, which undergoes oxidative degradation to lower the molecular weight.
期刊介绍：
ACS Macro Letters publishes research in all areas of contemporary soft matter science in which macromolecules play a key role, including nanotechnology, self-assembly, supramolecular chemistry, biomaterials, energy generation and storage, and renewable/sustainable materials. Submissions to ACS Macro Letters should justify clearly the rapid disclosure of the key elements of the study. The scope of the journal includes high-impact research of broad interest in all areas of polymer science and engineering, including cross-disciplinary research that interfaces with polymer science.
With the launch of ACS Macro Letters, all Communications that were formerly published in Macromolecules and Biomacromolecules will be published as Letters in ACS Macro Letters.
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