Developing thioxanthone based visible photoinitiators for radical polymerization

Wu, Qingqing; Xiong, Ying; Liang, Qiuhong; Tang, Hongding

doi:10.1039/c4ra07614a

Cited by 49 publications

(25 citation statements)

References 53 publications

(58 reference statements)

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“…Back electron transfer procedure is a term often used to indicate thermal reversal of the excited state electron transfer restoring the donor and acceptor in their original oxidation level . It may lead the photoinitiator to keep its structure . Upon visible light excitation of the n–π* transition, the generation of the triplet was very fast in aqueous solution (presumably as fast as in homogeneous solution) .…”

Section: Resultsmentioning

confidence: 99%

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Thioxanthone‐Based Hydrophilic Visible Photoinitiators for Radical Polymerization

Xiong

Yang

et al. 2016

Macro Chemistry & Physics

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Three thioxanthone‐based hydrophilic visible photoinitiators (TX‐MPEG350, TX‐MPEG550, and TX‐MPEG750) are prepared and characterized. All of them exhibit excellent water dispersion properties. Real‐time FTIR investigation shows that they can be used as visible photoinitiators for radical polymerization in waterborne systems in the presence and absence of the hydrogen donors. Among them, TX‐MPEG550 has been illustrated as the best hydrophilic visible photoinitiator in the presence of hydrogen donors and would have great potential applications in waterborne visible photocuring systems after carefully investigating the photopolymerization behavior of TX‐MPEGs in different conditions.

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Section: Resultsmentioning

confidence: 99%

“…Thus, it is of interest to develop waterborne visible TX photoinitiators. As the continuing interests to explore TX visible photointiators, herein, three polyether functionalized TX visible photointiators TX‐MPEGs (Scheme ) have been prepared and their properties have been investigated.…”

Section: Introductionmentioning

confidence: 99%

Thioxanthone‐Based Hydrophilic Visible Photoinitiators for Radical Polymerization

Xiong

Yang

et al. 2016

Macro Chemistry & Physics

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“…Thioxanthones (TX) are the important visible light photoinitiator candidates, we have reported a series of one-component amino-thioxanthone (ATX) visible light photoinitiator. [27,[31][32][33][34] As a part of our continuing interest in the design and development of amino-thioxanthone based visible photoinitiating systems for FRP, thioxanthonepolymethylhydrosiloxanes (TX-PMHSs) were synthesized by hydrosilylation (Scheme 1). The novel TX-PMHSs were solecomponent macromolecular visible photoinitiators.…”

Section: Introductionmentioning

confidence: 99%

Sole‐Component Visible Macrophotoinitiators with Si‐H: Decreased Oxygen Inhibition and Modified Cured Polymer Materials

Liao

Wang

et al. 2020

ChemistrySelect

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Three polymethylhydrosiloxane (PMHS)‐modified thioxanthone (TX) visible macrophotoinitiators (TX‐PMHSs) were designed and prepared by the partially hydrosilylation of 2‐allyl(methyl)amino‐9H‐thioxanthen‐9‐one (TX−A) and PMHS. Their characteristics of photopolymerization, photolysis, reduction of oxygen inhibition and the modification of the polymer materials were discussed. As sole‐component visible photoinitiators, TX‐PMHSs could even initiate 1, 6‐hexanedioldiacrylate (HDDA) polymerization in the air atmosphere. Moreover, TX‐PMHSs changed the surface wettability property of the cured polyurethane diacrylate prepolymer (PUA) film, and improved the thermal stability of the polymer network. Thus, this work provided an efficient strategy to decrease oxygen inhibition and improve the cured polymer material properties.

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“…As an important Type II photoinitiator, thioxanthone (TX) was used in the construction of polymerizable photoinitiator systems, but most of them were UV‐sensitive photoinitiators. Our research aims to construct the thioxanthone based visible light photoinitiating systems for radical polymerization . For aforementioned purpose, a polymerizable one‐component visible light photoinitiator 4‐((methyl(9‐oxo‐9H‐thioxanthen‐2‐yl)amino)methyl)phenyl acrylate (TX‐PA) (Figure ) has been studied .…”

Section: Introductionmentioning

confidence: 99%

High‐Performance and Low Migration One‐Component Thioxanthone Visible Light Photoinitiators

Tang

Xiong

et al. 2017

Macro Chemistry & Physics

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Two thioxanthone based acrylated one‐component visible light photoinitiators, 2‐(methyl(4‐((methyl(9‐oxo‐9H‐thioxanthen‐2‐yl)amino)methyl)benzyl)amino)ethyl acrylate (TX‐EA) and ((4‐((methyl(9‐oxo‐9H‐thioxanthen‐2‐yl)amino)methyl)benzyl)azanediyl)bis(ethane‐2,1‐diyl)diacrylate (TX‐BDA), are designed and synthesized. The results of photopolymerization and migration study demonstrate that TX‐EA and TX‐BDA are more effective one‐component visible light photoinitiators for free radical polymerization with excellent migration stability than 4‐((methyl(9‐oxo‐9H‐thioxanthen‐2‐yl)amino)methyl)phenyl acrylate. The mass fraction of the extracted TX‐BDA in a cured 1,6‐hexanediol diacrylate polymer film is as low as 0.55% and the residual amount is estimated to be only 90 ppm. TX‐BDA would have great potential to be used in visible light curing systems, particularly in the food packing or biomedical fields. Results demonstrate that the synergistic effect of hydrogen donors and polymerizable groups in photoinitiator plays an important role in realizing high performance and low migration in photopolymerization system.

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Developing thioxanthone based visible photoinitiators for radical polymerization

Cited by 49 publications

References 53 publications

Thioxanthone‐Based Hydrophilic Visible Photoinitiators for Radical Polymerization

Thioxanthone‐Based Hydrophilic Visible Photoinitiators for Radical Polymerization

Sole‐Component Visible Macrophotoinitiators with Si‐H: Decreased Oxygen Inhibition and Modified Cured Polymer Materials

High‐Performance and Low Migration One‐Component Thioxanthone Visible Light Photoinitiators

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