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http://hdl.handle.net/1942/27721
Title: | Continuous Flow Synthesis of Core Cross-Linked Star Polymers via Photo-Induced Copper Mediated Polymerization | Authors: | VRIJSEN, Jeroen Medeiros, Camila Osiro Gruber, Jonas JUNKERS, Tanja |
Issue Date: | 2019 | Source: | Polymer Chemistry, 10 (13), p. 1591-1598 | Abstract: | A convenient method to synthesize core cross-linked star polymers via a continuous flow photopolymerization process is developed. Photo-induced copper mediated radical polymerization was employed for arm and star synthesis. The arms of the core cross-linked star polymers are composed of poly(methyl acrylate) (with Mn, arm of 2600 or 4700 g·mol-1 , Đarm ≈ 1.12) and 1,4-butanediol diacrylate was used as core cross-linker. Flow polymerization enables rapid formation of star polymers (15-20 minutes, Mw, star flow = 170 400 g·mol-1, 33 arms). Further, a reactor cascade was build that combines arm synthesis and star synthesis without isolation of the intermediate product between both reactor stages. In this way star polymer is formed (Mw, star = 156 500 g·mol-1, 34 arms) in a one-pot fashion, yet under scalable conditions. Surface functionalized star polymers were obtained with similar molecular weights via alcohol-functional initiators. Finally, a flow reactor setup is demonstrated that allows for direct access to miktoarm star polymers. In there, two different arms are synthesizied from photopolymerization in parallel and then simultaneously fed into a third reactor. The resulting miktoarm core cross-linked star polymers composed of poly(methyl acrylate) and poly(benzyl acrylate) arms (Mw, star = 189 300 g·mol-1, 33 arms). The reactor cascade enables rapid star polymer formation in a continuous process (within 40 minutes, when reactor conditions are stable) without intermediate purification, improved illumination and facile upscaling. | Notes: | Junkers, T (reprint author), Hasselt Univ, Inst Mat Res IMO, Martelarenlaan 42, B-3500 Hasselt, Belgium. Monash Univ, Sch Chem, Polymer React Design Grp, 19 Rainforest Walk,Bldg 23, Clayton, Vic 3800, Australia. tanja.junkers@monash.edu | Document URI: | http://hdl.handle.net/1942/27721 | ISSN: | 1759-9954 | e-ISSN: | 1759-9962 | DOI: | 10.1039/C9PY00134D | ISI #: | 000462539300004 | Category: | A1 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
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File | Description | Size | Format | |
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Vrijsen_photoflow_stars.pdf | Peer-reviewed author version | 557.87 kB | Adobe PDF | View/Open |
c9py00134d.pdf Restricted Access | Published version | 934.48 kB | Adobe PDF | View/Open Request a copy |
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