Aqueous Photoiniferter Polymerization of Acrylonitrile.

IF 5.1 Q1 POLYMER SCIENCE ACS Macro Letters Pub Date : 2024-11-19 DOI:10.1021/acsmacrolett.4c00642
Evan K Stacy, Mac L McCormick, Kaden C Stevens, Penelope E Jankoski, Jeff Aguinaga, Derek L Patton, Brent S Sumerlin, Tristan D Clemons
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Abstract

Polyacrylonitrile (PAN) is a key industrial polymer for the production of carbon fiber for high-strength, lightweight composite material applications, with an estimated 90% of the carbon fiber market relying on PAN-based polymers. Traditionally, PAN synthesis is achieved by conventional radical polymerization, resulting in broad molecular weight distributions and the use of toxic organic solvents or surfactants during the synthesis. Additionally, attempts to improve polymer and processing properties by controlled radical polymerization methods suffer from low monomer conversions and struggle to achieve molecular weights suitable for producing high-performance carbon fiber. In this study, we present an aqueous photoiniferter (aqPI) polymerization of acrylonitrile, achieving high monomer conversion and high PAN molecular weights with significantly faster kinetics and dispersity control when compared to traditional methods. This approach allows for the unprecedented control of polymer properties that are integral for downstream processing for enhanced carbon fiber production.

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丙烯腈的水性光增塑聚合。
聚丙烯腈(PAN)是生产高强度、轻质复合材料用碳纤维的主要工业聚合物,据估计,90% 的碳纤维市场依赖于 PAN 基聚合物。传统上,PAN 的合成是通过传统的自由基聚合法实现的,因此分子量分布较广,合成过程中需要使用有毒的有机溶剂或表面活性剂。此外,试图通过受控自由基聚合方法来改善聚合物和加工性能的尝试受到了单体转化率低的困扰,并且难以获得适合生产高性能碳纤维的分子量。在本研究中,我们介绍了一种丙烯腈的水性光增塑剂(aqPI)聚合方法,与传统方法相比,该方法实现了高单体转化率和高 PAN 分子量,且动力学和分散度控制明显更快。这种方法可对聚合物特性进行前所未有的控制,而聚合物特性是下游加工过程中不可或缺的一部分,可提高碳纤维的产量。
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来源期刊
CiteScore
10.40
自引率
3.40%
发文量
209
审稿时长
1 months
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.
期刊最新文献
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