{"title":"Synthesis of Ultrahigh Molecular Weight Poly(Carboxylic Acids) via Aqueous Triplet-Enhanced Photoiniferter Polymerization","authors":"Yidan Chen, and , Zesheng An*, ","doi":"10.1021/acsmacrolett.6c00313","DOIUrl":null,"url":null,"abstract":"<p >Achieving precise control over the synthesis of high molecular weight poly(carboxylic acids) remains a formidable challenge. Herein, we report the use of triplet-enhanced photoiniferter polymerization (TEPP) to address this limitation. Aqueous TEPP of acrylic acid exhibits rapid kinetics, strict temporal control, high end-group fidelity, and excellent oxygen tolerance under mild blue light irradiation at room temperature, yielding poly(acrylic acid) with molecular weights up to 1370 kg mol<sup>–1</sup> (<i>Đ</i> = 1.10). Rheological studies reveal a pronounced influence of molecular weight on the chain dynamics and viscoelastic properties of the polymer solutions. Furthermore, this TEPP strategy is extended to the precipitation polymerization of 2-carboxyethyl acrylate, demonstrating its synthetic versatility and broad applicability.</p>","PeriodicalId":18,"journal":{"name":"ACS Macro Letters","volume":"15 7","pages":"1058–1063"},"PeriodicalIF":4.9000,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Macro Letters","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsmacrolett.6c00313","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2026/7/9 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
引用次数: 0
Abstract
Achieving precise control over the synthesis of high molecular weight poly(carboxylic acids) remains a formidable challenge. Herein, we report the use of triplet-enhanced photoiniferter polymerization (TEPP) to address this limitation. Aqueous TEPP of acrylic acid exhibits rapid kinetics, strict temporal control, high end-group fidelity, and excellent oxygen tolerance under mild blue light irradiation at room temperature, yielding poly(acrylic acid) with molecular weights up to 1370 kg mol–1 (Đ = 1.10). Rheological studies reveal a pronounced influence of molecular weight on the chain dynamics and viscoelastic properties of the polymer solutions. Furthermore, this TEPP strategy is extended to the precipitation polymerization of 2-carboxyethyl acrylate, demonstrating its synthetic versatility and broad applicability.
实现对高分子量聚羧酸合成的精确控制仍然是一个艰巨的挑战。在这里，我们报告使用三重增强光干扰素聚合（TEPP）来解决这一限制。丙烯酸水溶液TEPP在室温下表现出快速的动力学、严格的时间控制、高的端基保真度和优异的氧耐受性，在温和的蓝光照射下，产生分子量高达1370 kg mol-1的聚丙烯酸（Đ = 1.10）。流变学研究表明分子量对聚合物溶液的链动力学和粘弹性有显著影响。此外，该TEPP策略扩展到沉淀聚合的2-羧基乙基丙烯酸酯，证明了其合成的通用性和广泛的适用性。
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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