Visible-light-mediated, additive-free, and open-to-air controlled radical polymerization of acrylates and acrylamides
Name
c9py00022d.pdf
Size
1.29 MB
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Adobe PDF
Checksum (MD5)
05372dc7e2dfcfe07219e4d3793ed0dd
Author(s)
Lamb, Jessica
Qin, Ke
Johnson, Jeremiah A.
Date Issued
February 2019
Journal
Polymer Chemistry
Publisher
Royal Society of Chemistry
Citation
Lamb, Jessica R., K. Peter Qin, and Jeremiah A. Johnson. “Visible-Light-Mediated, Additive-Free, and Open-to-Air Controlled Radical Polymerization of Acrylates and Acrylamides.” Polymer Chemistry (2019).
Version
Final published version
Abstract
Oxygen tolerance in controlled radical polymerizations has been an active field of study in recent years. Herein, we report a photocontrolled, additive-free iniferter polymerization that operates in completely open vials utilizing the “polymerizing through oxygen” mechanism. Trithiocarbonates are directly activated with high intensity 450 nm light to produce narrowly dispersed (M[subscript w]/M[subscript n] = 1.1–1.6) polyacrylates and polyacrylamides. Living behavior is demonstrated through chain extension, block copolymer synthesis, and control over molecular weight through varying the monomer : iniferter ratio. A slight increase in induction period is observed for the open vial polymerization compared to the air-free reaction, but polymers with similar M[subscript n] and M[subscript w]/M[subscript n] values are produced after 30–60 minutes of irradiation. This system will provide a convenient platform for living additive manufacturing because of its fast reaction time, air tolerance, wide monomer scope, and lack of any additives beyond the monomer, iniferter, and DMSO solvent.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
Terms of Use
Creative Commons Attribution 3.0 unported license
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DOI of Published Version
https://doi.org/10.1039/C9PY00022D
