Premium
Visible Light Induced Cationic Polymerization of Epoxides by Using Multiwalled Carbon Nanotubes
Author(s) -
Sangermano Marco,
Rodriguez Damian,
Gonzalez Monica C.,
Laurenti Enzo,
Yagci Yusuf
Publication year - 2018
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201800250
Subject(s) - cationic polymerization , photopolymer , polymerization , photochemistry , monomer , ring opening polymerization , visible spectrum , materials science , radical , polymer chemistry , carbocation , chemistry , polymer , organic chemistry , optoelectronics
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.