Tasdelen Mehmet Atilla, Yagci Yusuf
Department of Polymer Engineering, Faculty of Engineering, Yalova University, 77200 Yalova, Turkey.
Department of Chemistry, Istanbul Technical University, Maslak, TR-34469 Istanbul, Turkey.
ACS Macro Lett. 2017 Dec 19;6(12):1392-1397. doi: 10.1021/acsmacrolett.7b00788. Epub 2017 Nov 30.
This paper reviews the photoinduced reactions of benzodioxinones and how they function in polymer synthesis and UV curing applications. The mechanistic characteristics of the ketene and benzophenone production from the photolysis of benzodioxinone indicate that, under certain conditions, each intermediate may undergo further reactions expedient for the formation of various polymeric structures. While ketenes are efficient contributors to step-growth polymerization when subjected to reaction with the compounds possessing hydroxyl or amine groups, the released benzophenone can be utilized as a photoinitiator in both the free radical and cationic polymerizations. It has been shown that the photolysis of heterobifunctional monomers equipped with benzodioxinone and aliphatic hydroxyl groups leads to the formation of oligoesters with a narrow molecular weight distribution. We also validated the photochemical ability of benzodioxinone to induce the synthesis of block and graft copolymers, hybrid and branched polymers, and cross-linked monofunctional vinyl monomers or hydroxyl group-containing linear polymers.
本文综述了苯并二恶唑酮的光致反应及其在聚合物合成和紫外光固化应用中的作用。苯并二恶唑酮光解生成乙烯酮和二苯甲酮的机理特征表明，在某些条件下，每种中间体可能会进一步发生反应，有利于形成各种聚合物结构。当乙烯酮与含有羟基或胺基的化合物反应时，它是逐步增长聚合反应的有效促进剂，而释放出的二苯甲酮可在自由基聚合和阳离子聚合中用作光引发剂。研究表明，带有苯并二恶唑酮和脂肪族羟基的异双官能单体的光解会导致形成分子量分布窄的低聚酯。我们还验证了苯并二恶唑酮诱导合成嵌段共聚物、接枝共聚物、杂化聚合物和支化聚合物以及交联单官能乙烯基单体或含羟基线性聚合物的光化学能力。
