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Electron paramagnetic resonance (EPR) and electron and nuclear double resonance (ENDOR) characterization of radicals produced during the photopolymerization of multifunctional (meth)acrylate monomers
Author(s) -
Selli Elena,
Oliva Cesare
Publication year - 1995
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1995.021961220
Subject(s) - electron paramagnetic resonance , radical , chemistry , electron nuclear double resonance , photochemistry , nitroxide mediated radical polymerization , photopolymer , monomer , pulsed epr , resonance (particle physics) , nuclear magnetic resonance , polymer chemistry , polymer , radical polymerization , atomic physics , spin echo , organic chemistry , medicine , physics , radiology , magnetic resonance imaging
The electron paramagnetic resonance (EPR) spectra obtained from radicals produced during the photopolymerization of multifunctional acrylic and methacrylic monomers have been interpreted by taking into account the EPR line‐broadening due to dynamic exchange between two conformations of the β‐methylene groups and a spin‐spin dipolar interaction between radicals trapped in rigid regions of the polymer. From 1 H matrix electron and nuclear double resonance (ENDOR) spectra the distance between the radical center and the surrounding shells of protons can be estimated.