Elucidation of Network Structure in Cationic Photopolymerization of Cyclic Ether Comonomers

2021 ◽  
Author(s):  
Sara Kaalberg ◽  
Sage Schissel ◽  
Michael Soumounthong ◽  
Julie L. P. Jessop
Keyword(s):  
Free Radical ◽  
Network Structure ◽  
Cyclic Ether ◽  
Free Radical Photopolymerization ◽  
Cationic Photopolymerization

Although cationic photopolymerizations are not inhibited by oxygen, polymerization rates and conversions of commonly used cycloaliphatic epoxides are typically much lower than industrially prevalent acrylates undergoing free-radical photopolymerization. The addition...

Dihydroxyanthraquinone derivatives: natural dyes as blue-light-sensitive versatile photoinitiators of photopolymerization

2016 ◽  
Vol 7 (47) ◽  
pp. 7316-7324 ◽  
Author(s):  
Jing Zhang ◽  
Jacques Lalevée ◽  
Jiacheng Zhao ◽  
Bernadette Graff ◽  
Martina H. Stenzel ◽  
...  
Keyword(s):  
Free Radical ◽  
Blue Light ◽  
Natural Dyes ◽  
Free Radical Photopolymerization ◽  
Cationic Photopolymerization

Dihydroxyanthraquinone derivatives can be used as versatile blue-light-sensitive photoinitiators for cross-linked free radical photopolymerization, RAFT photopolymerization, and cationic photopolymerization.

scholarly journals The Applicability of 2-amino-4,6-diphenyl-pyridine-3-carbonitrile Sensors for Monitoring Different Types of Photopolymerization Processes and Acceleration of Cationic and Free-Radical Photopolymerization Under Near UV Light

Sensors ◽  
2019 ◽  
Vol 19 (7) ◽  
pp. 1668 ◽  
Author(s):  
Joanna Ortyl ◽  
Paweł Fiedor ◽  
Anna Chachaj-Brekiesz ◽  
Maciej Pilch ◽  
Emilia Hola ◽  
...  
Keyword(s):  
Free Radical ◽  
Fluorescence Probe ◽  
Uv Light ◽  
Molecular Sensors ◽  
Long Wavelength ◽  
Free Radical Photopolymerization ◽  
Cationic Photopolymerization ◽  
Different Types ◽  
Coumarin 1 ◽  
Higher Sensitivity

The performance of a series of 2-amino-4,6-diphenyl-pyridine-3-carbonitrile derivatives as fluorescent molecular sensors for monitoring photopolymerization processes of different monomers by the Fluorescence Probe Technique (FPT) was studied. It has been shown that the new derivatives are characterized by much higher sensitivity than the commercially available 7-diethylamino-4-methylcoumarin (Coumarin 1) and trans-2-(2′,5′-dimethoxyphenyl)ethenyl-2,3,4, 5,6-pentafluorobenzene (25ST) probes. It has been discovered that the 2-amino-4,6-diphenyl-pyridine-3-carbonitrile derivatives accelerate the cationic photopolymerization process initiated with diphenyliodonium photoinitiators at the wavelength where the photoinitiator alone does not work. They are particularly efficient for the photoinitiation of cationic photopolymerization of an epoxide and vinyl monomers. Consequently, the application of the 2-amino-4,6-diphenyl-pyridine-3-carbonitrile derivatives in a dual role: (a) as fluorescent sensors for monitoring the free-radical, thiol-ene and cationic polymerization progress, and (b) as long-wavelength co-initiators for diphenyliodonium salts initiators, is proposed.

scholarly journals Cubane Cu4I4(phosphine)4 Complexes as New Co-initiator for Free Radical Photopolymerization: Towards Aromatic Amine-Free Systems

2021 ◽  
Author(s):  
Jacques Lalevée ◽  
Fatima Hammoud ◽  
Mahmoud Rahal ◽  
Julien Egly ◽  
Fabrice Morlet-Savary ◽  
...  
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Aromatic Amine ◽  
Free Radical Polymerization ◽  
Copper Iodide ◽  
Free Radical Photopolymerization ◽  
Acrylate Monomers ◽  
First Time

The investigation of copper-iodide cubane derivatives as new co-initiators for the free radical polymerization (FRP) of acrylate monomers under mild irradiation conditions is described for the first time here. These...

Star-shaped Polymers through Simple Wavelength-Selective Free-Radical Photopolymerization

2017 ◽  
Vol 56 (45) ◽  
pp. 14306-14309 ◽  
Author(s):  
Anna Eibel ◽  
David E. Fast ◽  
Jürgen Sattelkow ◽  
Michal Zalibera ◽  
Jieping Wang ◽  
...  
Keyword(s):  
Free Radical ◽  
Free Radical Photopolymerization

Photopolymerization of methyl methacrylate: effects of photochemical and photonic parameters on the chain length

2014 ◽  
Vol 5 (21) ◽  
pp. 6236-6243 ◽  
Author(s):  
V. Charlot ◽  
A. Ibrahim ◽  
X. Allonas ◽  
C. Croutxé-Barghorn ◽  
C. Delaite
Keyword(s):  
Free Radical ◽  
Methyl Methacrylate ◽  
Chain Length ◽  
Free Radical Photopolymerization

The effects of photochemical and photonic parameters are investigated on the chain length of poly(methylmethacrylate) (PMMA) as formed by the free radical photopolymerization process.

Substituent Effects on Photoinitiation Ability of Coumarin-Based Oxime-Ester Photoinitiators for Free Radical Photopolymerization

2021 ◽  
Author(s):  
Jacques Lalevée ◽  
Fatima Hammoud ◽  
Nicolas giacoletto ◽  
Guillaume Noirbent ◽  
Bernadette Graff ◽  
...  
Keyword(s):  
Free Radical ◽  
Visible Light ◽  
Substituent Effects ◽  
Free Radical Photopolymerization

In this paper, a series of coumarin chromophore-based oxime-esters was designed and synthesized as visible light photoinitiators (PIs). Interestingly, upon exposure to irradiation of a LED at 405 nm, the...

Antioxidant Activity of Silk Peptide and Co-initiation Behavior in Free Radical Photopolymerization of Acrylamide

2019 ◽  
Vol 20 (8) ◽  
pp. 1555-1563 ◽  
Author(s):  
Xuying Nan ◽  
Lili Sun ◽  
Xinming Song ◽  
Mingshu Wu ◽  
Guangying Chen ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Free Radical ◽  
Free Radical Photopolymerization ◽  
Silk Peptide

scholarly journals NIR Sensitizer Operating under Long Wavelength (1064 nm) for Free Radical Photopolymerization Processes

2020 ◽  
Vol 41 (15) ◽  
pp. 2000289
Author(s):  
Haifaa Mokbel ◽  
Bernadette Graff ◽  
Frédéric Dumur ◽  
Jacques Lalevée
Keyword(s):  
Free Radical ◽  
Long Wavelength ◽  
Free Radical Photopolymerization
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