Halogen Effect in Dual-Catalysis PhotoATRP
Halil Ibrahim Coskun, Rushik Radadiya, Gorkem Yilmaz, Krzysztof Matyjaszewski
TL;DR
This paper studies how different halogens affect the efficiency of a light-driven polymerization process called photoATRP.
Contribution
It reveals that bromine-based systems outperform chlorine-based ones in terms of speed and efficiency in dual-catalyzed photoATRP.
Findings
Br-based systems enable faster polymerization and require lower catalyst loadings than Cl-based systems.
MA polymerizes faster than MMA despite MMA's higher ATRP equilibrium constants.
Ligand choice significantly affects polymerization control and dispersity.
Abstract
The effect of halogen type in dual-catalyzed photoinduced atom transfer radical polymerization (photoATRP) of methyl acrylate (MA) and methyl methacrylate (MMA) was systematically investigated under green LED irradiation (λ ∼ 527 nm) using rhodamine 6G (RD-6G) as a photocatalyst. Poly(methyl acrylate) and poly(methyl methacrylate) with ω-bromo and ω-chloro chain ends were synthesized via CuX2/ligand (X = Br, Cl) complexes with excess ligand as an electron donor. Kinetic analyses revealed that Br-based systems exhibited significantly faster activation and allowed controlled polymerizations at markedly lower copper and photocatalyst loadings than their Cl-based counterparts. MA polymerizations were faster than MMA despite the latter’s larger ATRP equilibrium constants, attributed to the higher propagation rate constant of acrylates and similar rates of reduction of CuX2/ligand…
Genes, proteins, chemicals, diseases, species, mutations and cell lines named across the full text — each resolved to its canonical identifier and authoritative record.
Click any figure to enlarge with its caption.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsAdvanced Polymer Synthesis and Characterization · Photopolymerization techniques and applications · Photochromic and Fluorescence Chemistry