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High speed electron spin resonance techniques applied to polymer fracture
Author(s) -
Britt A. D.,
Moniz W. B.,
Chingas G. C.
Publication year - 1979
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760190211
Subject(s) - radical , microsecond , electron paramagnetic resonance , materials science , beta scission , fracture (geology) , photochemistry , polymer , resonance (particle physics) , spin (aerodynamics) , composite material , nuclear magnetic resonance , atomic physics , chemistry , organic chemistry , thermodynamics , radical substitution , optics , physics
Abstract Mechanical fracture of nylon 6 produces free radicals as a direct result of bond‐breaking; these initial free radicals rapidly decay into secondary free radicals at room temperature. Aromatic nitro‐compounds react with the initial, but not the secondary, free radicals. The rate of reaction is sufficiently fast to compete with the usual initial radical decay process, even at room temperature. Considerations involved in applying high speed (microsecond) electron spin resonance techniques are discussed.