Visible Light Induced Cationic Polymerization of Epoxides by Using Multiwalled Carbon Nanotubes

Macromol Rapid Commun. 2018 Jul;39(13):e1800250. doi: 10.1002/marc.201800250. Epub 2018 May 27.


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.

Keywords: MWCNTs; epoxy monomers; visible light cationic photopolymerization.

MeSH terms

  • Catalysis
  • Light*
  • Nanotubes, Carbon / chemistry*
  • Photochemical Processes*


  • Nanotubes, Carbon