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Electron Spin Resonance Spin Trapping Technique: Application to the Cleavage Process of Photoinitiators
Author(s) -
Criqui Adrien,
Lalevée Jacques,
Allonas Xavier,
Fouassier JeanPierre
Publication year - 2008
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.200800303
Subject(s) - spin trapping , nitrone , electron paramagnetic resonance , chemistry , cleavage (geology) , hyperfine structure , photochemistry , polymerization , adduct , selectivity , spin (aerodynamics) , polymer chemistry , polymer , materials science , nuclear magnetic resonance , organic chemistry , atomic physics , catalysis , physics , fracture (geology) , cycloaddition , composite material , engineering , aerospace engineering
The cleavage of different photoinitiators (PIs) of polymerization is investigated by the ESR spin trapping using two different spin traps (STs): 5,5′‐dimethyl‐1‐pyrroline N ‐oxide (DMPO) and phenyl N ‐ tert ‐butyl nitrone (PBN). The hyperfine splitting constants for the different adducts are measured and provide a new set of data. These results show a difference of selectivity between the two (STs) and outline their complementarities.