Lecompère Maxime, Allonas Xavier, Maréchal David, Criqui Adrien
Laboratory of Macromolecular Photochemistry and Engineering, University of Haute Alsace, 3b rue Alfred Werner, 68093, Mulhouse, France.
Mäder Research, 130 rue de la Mer Rouge, 68200, Mulhouse, France.
Macromol Rapid Commun. 2017 Jul;38(13). doi: 10.1002/marc.201600660. Epub 2017 Jan 24.
Pyrylium salts combined with vinyl ethers are shown to act as new versatile dual-cure initiating systems for both photochemical and thermal initiation of oxirane monomers. The combination of both possibilities allows the curing of thick samples through photoinduced frontal polymerization. On the basis of quantum calculations and photochemical experiments, some clues are given about the reaction mechanisms involved. Interestingly, a sequential kick-starting effect is observed in the presence of vinyl ether enabling the curing of oxetane monomers. Thereby, this communication presents a short overview of potential of pyrylium salts in cationic polymerization of oxiranes.
已表明，吡喃鎓盐与乙烯基醚结合可作为新型多功能双固化引发体系，用于环氧乙烷单体的光化学引发和热引发。这两种引发方式相结合，能够通过光诱导前沿聚合对厚样品进行固化。基于量子计算和光化学实验，给出了一些有关所涉及反应机理的线索。有趣的是，在乙烯基醚存在的情况下观察到一种顺序启动效应，使得氧杂环丁烷单体能够固化。因此，本通讯简要概述了吡喃鎓盐在环氧乙烷阳离子聚合中的潜力。
