Recent advances on naphthoquinone-imidazolyl and naphthoquinone-thiazolyl derivatives as photoinitiators of photopolymerization

European Polymer Journal, Journal Year: 2024, Volume and Issue: 219, P. 113401 - 113401

Published: Aug. 27, 2024

Language: Английский

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Recent advances on photochroms used as visible light photoinitiators of polymerization

European Polymer Journal, Journal Year: 2023, Volume and Issue: 203, P. 112697 - 112697

Published: Dec. 19, 2023

Language: Английский

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High Power Sunlight‐Simulated UV‐Induced Radical Polymerization: Self‐Initiation and Self‐Crosslinking

Macromolecular Materials and Engineering, Journal Year: 2024, Volume and Issue: 309(5)

Published: Jan. 24, 2024

Abstract Under high power UV irradiation, radicals can be generated from double bonds through photodissociation, H‐abstraction, or oxygen initiation mechanisms. This eliminates the need for externally added initiators in photopolymerization. study investigates high‐power sunlight‐simulated UV‐induced free radical polymerization under various experimental conditions, including presence of inhibitors, open closed systems, and partial degassing. Additionally, atom transfer is explored by adding CuBr 2 /ligand (1:2) catalyst at 100 1000 ppm molar concentration copper. Delicate fabrication real‐world thin films, coatings, delicate 3D composites further demonstrates reliability versatility this technology.

Language: Английский

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Synthesis of One‐Component Type II Visible‐Light‐Absorbing Chalcones Containing Fused Aromatic Rings and Investigation of Free Radical Photopolymerization Properties

Macromolecular Chemistry and Physics, Journal Year: 2024, Volume and Issue: 225(9)

Published: Feb. 7, 2024

Abstract This paper presents four one‐component Type II visible‐light‐absorbing chalcones ( CY10‐13 ) that containing various fused aromatic rings as its π‐conjugated moiety, is a 2‐naphthalene moiety for CY10 , 1‐naphthalene CY11 benzofuran CY12, and benzothiophene CY13 . The absorption region changes significantly when introducing rings. However, they all exhibit good properties ranging from 300 to 450 nm can be well‐matched under ultraviolet (UV), 365 405 light irradiations. Furthermore, the structure–reactivity relationship also studied through thermal, photochemical, electrochemical, computation properties. Finally, demonstrate photoinitiating ability without additive additional hydrogen donor in their systems. Both of CY12 based formulations initiate sufficiently upon UV light‐emitting diode (LED)@405 exposures. triphenylamine‐substituted chalcone analogous CY8 added comparison. Although compounds have lower harvesting regions than some those new better photoreactivity. Thus, fuses ring featuring straightforward synthesis well versatile performance, has great potential photopolymerization applications.

Language: Английский

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Efficient and safe coumarin-carbazole-based oxime esters for one/two-photon polymerization of LEDs/NIR light

European Polymer Journal, Journal Year: 2024, Volume and Issue: 214, P. 113176 - 113176

Published: May 25, 2024

Language: Английский

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Carbazole-fused coumarin bis oxime esters (CCOBOEs) as efficient photoinitiators of polymerization for 3D printing with 405 nm LED

European Polymer Journal, Journal Year: 2024, Volume and Issue: 215, P. 113186 - 113186

Published: June 15, 2024

Language: Английский

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Phenothiazine-carbazole-based bis oxime esters (PCBOEs) for visible light polymerization

European Polymer Journal, Journal Year: 2024, Volume and Issue: 219, P. 113381 - 113381

Published: Aug. 15, 2024

Language: Английский

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Recent advances on crosslinkable thioxanthones for photopolymerization

European Polymer Journal, Journal Year: 2024, Volume and Issue: 216, P. 113299 - 113299

Published: July 14, 2024

Language: Английский

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Novel amphipathic photoinitiating systems utilizing ethyl violet for acrylate and thiol-based click photopolymerization under 630 nm and 450 nm LED

European Polymer Journal, Journal Year: 2024, Volume and Issue: 217, P. 113334 - 113334

Published: July 23, 2024

Language: Английский

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Typ‐I‐Photoinitiator auf der Basis nachhaltiger Kohlenstoffpunkte

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(29)

Published: April 29, 2024

Abstract Nachhaltige Kohlenstoffpunkte, die an der Oberfläche Oximestergruppen enthalten, welche einer homolytischen Bindungsspaltung folgen, zeigen ein Potential als Photoinitiatoren für traditionelle freie radikalische Photopolymerisation. Die Kohlenstoffpunkte wurden nach einem solvothermalen Verfahren aus nachhaltigem Furfural, welches über Lignocellulose erhältlich ist, hergestellt. Aldehydgruppen reagierten mit Hydroxylamin zu dem entsprechendem Oxim, während Reaktion Benzoylchlorid bio‐basierten Typ I Photoinitiator ( CD‐PI ) führte, welcher nachhaltige enthält. Fähigkeit zur Photoinitiierung wurde unter UV‐Bestrahlung bei 365 nm traditionellen PI Ethyl (2,4,6‐trimethyl benzoyl) phenyl phosphinat TPO ‐ L mittels Echtteit FTIR Spektroskopie verglichen. auf Gemisch von Urethandimethacrylat UDMA und Tripropylenglykoldiacrylat TPGDA basierte Photopolymerzusammensetzung führte Verwendung oder TPO‐L ähnlichen Endumsatz etwa 70 %. Dennoch erschien das vernetzte Material im Fall Zusammensetzungen, verarbeitet wurden, homogen, jene, hergestellt heterogen waren, was durch beiden Glasübergangstemperaturen gezeigt wurde. Außerdem war Migrationsgeschwindigkeit in den gehärteten Proben geringer Vergleich jenen eingesetzt

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