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首页> 外文期刊>Journal of Applied Polymer Science >Efficient visible photoinitiator with high-spectrum stability in an acid medium for free-radical and free-radical-promoted cationic photopolymerization based on erythrosine B derivatives
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Efficient visible photoinitiator with high-spectrum stability in an acid medium for free-radical and free-radical-promoted cationic photopolymerization based on erythrosine B derivatives

机译：在酸性介质中具有高光谱稳定性的高效可见光引发剂，可用于基于赤藓红B衍生物的自由基和自由基促进的阳离子光聚合

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摘要

Three dye-linked photoinitiators with excellent spectral stability in an acid medium were synthesized by the covalent bonding of a coinitiator (tertiary amine) and a benzoyl group or two coinitiators to the phenolic and carboxyl group position of erythrosine B. The combination of the iodonium salt and free tertiary amino used to initiate the free-radical/cationic visible photopolymerization was investigated to acquire the relationship between the structure and performance. The photoinitiating ability of the derivative with the phenolic position bearing a coinitiator was poorer than of the derivative with the carboxyl group bearing one because of the strong back electron transfer of the former. For the derivative with a linked coinitiator on the carboxyl position, the proximity effect between the sensitizer and the coinitiator moiety resulted in an excellent photoinitiating ability for radical/cationic polymerization; this suggested its potential for application. Although radical/cationic photopolymerization could be initiated by the derivative/coinitiator/iodonium salt, the different component ratios between them had different effects on these two polymerizations; this provided useful information for the design of effective photoinitiators for different polymerizations. On the basis of the fluorescence quenching and photopolymerization results, a corresponding synergistic mechanism was proposed. (C) 2015 Wiley Periodicals, Inc.
机译：通过将共引发剂（叔胺）和苯甲酰基或两个共引发剂共价键合到赤藓红B的酚和羧基位置上，合成了三种在酸性介质中具有出色光谱稳定性的染料连接的光引发剂。研究了用于引发自由基/阳离子可见光聚合反应的游离叔氨基，以了解其结构与性能之间的关系。具有苯酚位置的共引发剂的衍生物的光引发能力比具有羧基的衍生物的光引发能力差，这是因为前者的强背电子转移。对于在羧基上具有连接的共引发剂的衍生物，敏化剂和共引发剂部分之间的邻近效应导致自由基/阳离子聚合具有出色的光引发能力。这表明它具有应用潜力。尽管自由基/阳离子光聚合反应可以通过衍生物/共引发剂/碘鎓盐引发，但它们之间不同的组分比对这两种聚合反应有不同的影响。这为设计用于不同聚合反应的有效光引发剂提供了有用的信息。根据荧光猝灭和光聚合的结果，提出了相应的协同机理。 （C）2015年Wiley Periodicals，Inc.

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