Visible Light Induced Cationic Polymerization of Epoxides by Using Multiwalled Carbon Nanotubes,Macromolecular Rapid Communications

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Visible Light Induced Cationic Polymerization of Epoxides by Using Multiwalled Carbon Nanotubes
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2018-05-27 , DOI: 10.1002/marc.201800250
Marco Sangermano ₁ , Damian Rodriguez ₂ , Monica C. Gonzalez ₂ , Enzo Laurenti ₃ , Yusuf Yagci ₄

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The visible light induced cationic polymerization of epoxides can be achieved by means of multiwalled carbon nanotubes (MWCNTs), which act as visible light photoinitiators via a radical‐induced cationic photopolymerization process. When MWCNTs are irradiated with longer wavelengths (above 400 nm), they generate carbon radicals, by means of hydrogen abstraction from the epoxy monomer; these radicals are oxidized in the presence of iodonium salt to a carbocation that is sufficiently reactive to start the cationic ring‐opening polymerization of an epoxy monomer. These mechanisms have been supported by electron paramagnetic resonance analysis.

中文翻译：

使用多壁碳纳米管的可见光诱导的环氧树脂阳离子聚合

可见光诱导的环氧化物的阳离子聚合可以通过多壁碳纳米管（MWCNT）来实现，该碳纳米管通过自由基诱导的阳离子光聚合过程充当可见光的光引发剂。当用更长的波长（400 nm以上）辐照MWCNT时，它们会通过从环氧单体中提取氢来产生碳自由基。这些自由基在碘鎓盐的存在下被氧化成碳正离子，该碳正离子具有足够的反应性，可以启动环氧单体的阳离子开环聚合反应。这些机制已得到电子顺磁共振分析的支持。

更新日期：2018-05-27

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