Degradable and Chain Extendable Segmented Hyperbranched Copolymers by Wavelength-Selective Photoiniferter Polymerization Using a Trithiocarbonate-Derived Dimethacrylate

IF 5.1 Q1 POLYMER SCIENCE ACS Macro Letters Pub Date : 2024-12-23 DOI:10.1021/acsmacrolett.4c00771
Yanwen Chen, Ruiming Wang, Xinxin Sheng, Li Zhang, Jianbo Tan
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Abstract

In this study, segmented hyperbranched copolymers with degradable and chain extendable cross-linker branch points were synthesized via green light-activated photoiniferter copolymerization of poly(ethylene glycol) methyl ether methacrylate (PEGMA) and a trithiocarbonate-derived dimethacrylate. A series of segmented hyperbranched copolymers with different degrees of branching were synthesized by changing the feed ratio of PEGMA to cross-linker to chain transfer agent. The segmented hyperbranched copolymers could be degraded into linear polymer chains by removing the trithocarbonate groups, which provides fundamental insights into the growth of primary chains during photoiniferter copolymerization. Switching to blue light irradiation allowed for the chain extension of poly(N,N-dimethylacrylamide) (PDMA) both at the branch points and at the chain ends. Finally, the formed segmented hyperbranched copolymers were explored as macromolecular chain transfer agents to prepare segmented hyperbranched block copolymer nanoparticles via polymerization-induced self-assembly. This study not only leads to new examples of degradable and chain extendable segmented hyperbranched polymers but also provides important insights into the formation of branched polymers via copolymerization of multivinyl monomers.

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波长选择性光干扰聚合的可降解和可扩链分段超支化共聚物
本研究以聚乙二醇甲基丙烯酸甲酯(PEGMA)和三硫代碳酸盐衍生的二甲基丙烯酸甲酯为原料,通过绿光活化光干扰共聚,合成了具有可降解和可扩链交联支点的节段超支化共聚物。通过改变聚乙二醇(PEGMA)与交联剂和链转移剂的投料比,合成了一系列具有不同支化程度的分段式超支化共聚物。通过去除三硫碳酸盐基团,可以将分节的超支化共聚物降解为线性聚合物链,这为光干扰共聚过程中初级链的生长提供了基本的见解。切换到蓝光照射允许聚(N,N-二甲基丙烯酰胺)(PDMA)的链在分支点和链端延伸。最后,通过聚合诱导自组装的方法,将形成的片段化超支化嵌段共聚物作为大分子链转移剂,制备了片段化超支化嵌段共聚物纳米颗粒。这项研究不仅带来了可降解和可扩展链的分段超支化聚合物的新例子,而且为通过多乙烯基单体共聚形成支化聚合物提供了重要的见解。
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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.
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