Poly(ethylene glycol)‐thioxanthone prepared by Diels–Alder click chemistry as one‐component polymeric photoinitiator for aqueous free‐radical polymerization |
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| Authors: | Hakan Akat Burcin Gacal Demet Karaca Balta Nergis Arsu Yusuf Yagci |
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| Affiliation: | 1. Department of Chemistry, Istanbul Technical University, Maslak, Istanbul 34469, Turkey;2. On leave from Egean University, Department of Chemistry, Bornova, Izmir, Turkey.;3. Department of Chemistry, Yildiz Technical University, Davutpasa Campus, Istanbul 34210, Turkey |
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| Abstract: | Novel water‐borne macrophotoinitiator containing thioxanthone (TX) end group was successfully synthesized by using Diels–Alder (DA) [4 + 2] click chemistry strategy. For this purpose, thioxanthone‐anthracene (TX‐A) and maleimide end‐functionalized poly(ethylene glycol) (PEG‐MI) were reacted in toluene at reflux temperature for 48 h. The final polymer (PEG‐TX) and the intermediates were characterized in detail by spectral analysis. PEG‐TX possesses absorption characteristics similar to the parent TX. The one‐component photoinitiating nature of the photointiator was demonstrated by photopolymeization of several hydrophilic vinyl monomers, such as acrylic acid, acrylamide, 2‐hydroxyethyl acrylate, and 1‐vinyl‐2‐pyrrolidone. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 2109–2114, 2010 |
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| Keywords: | aqueous free‐radical polymerization click chemistry Diels– Alder cycloaddition macrophotoinitiator photopolymerization thioxanthone |
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