Photoinduced redox initiation for fast polymerization of acrylaytes based on latent superbase and peroxides
Photoinduced redox initiation for fast polymerization of acrylaytes based on latent superbase and peroxides
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DOI：
10.1016/j.polymer.2012.05.031
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发表时间：
2012-07
期刊：
影响因子：
4.6
通讯作者：
Minghui He;X. Huang;Yugang Huang;Z. Zeng;Jianwen Yang
中科院分区：
文献类型：
--
作者：
Minghui He;X. Huang;Yugang Huang;Z. Zeng;Jianwen Yang
本文提出了一种基于光潜超强碱和易获得的过氧化物的协同光引发体系，通过光潜氧化还原加速反应进行丙烯酸酯光聚合的高效策略。光生胺与过氧化物之间的有效相互作用可立即引发丙烯酸酯聚合。由于所产生的长效胺与过氧化物的持续相互作用，因此在光引发自由基聚合中最初实现了照射后的显著后转化，这对于光屏蔽材料的辐射交联是重要的。为了探索光引发体系的协同相互作用，过氧化物结构和QA-DBU：BPO比例的影响已通过RTIR检查，表明所有过氧化物都适用于丙烯酸酯的最终转化率。此外，BPO和CHP显着加快在空气气氛中的光聚合速率。QA-DBU和BPO作为光聚合引发体系的协同效率接近于传统的D-1173光引发剂。
The article presents a highly effective strategy for photopolymerization of acrylates via photolatent redox-accelerated reaction based on the synergistic photoinitiating systems containing photolatent superbase and readily available peroxides. Polymerization of acrylates could be instantly initiated with the effective interaction between the photogenerated amine and peroxides. Due to the persistent interaction of produced longeval amine with peroxides, remarkable post conversion after irradiation, which is significant for radiation crosslinking of photo-screened materials, was thus initially achieved in photoinitiated free radical polymerization. To explore the synergistic interactions of the photoinitiating systems, the effect of peroxide structures and QA-DBU:BPO ratios had been examined by RTIR, showing that all peroxides are applicable as the final conversion rate of acrylates is concerned. Further, BPO and CHP significantly accelerated the photopolymerization rate in air atmosphere. The synergistic efficiency of QA-DBU and BPO as a photopolymerization initiatiation system was close to that of the conventional D-1173 photoinitiator.