Premium
Molecular mobility of nitroxide spin probes in glassy polymers: Models of the complex motion of spin probes
Author(s) -
Chernova Daria A.,
Vorobiev Andrey Kh.
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.33337
Subject(s) - nitroxide mediated radical polymerization , spin probe , polymer , motional narrowing , electron paramagnetic resonance , spin (aerodynamics) , chemical physics , spectral line , molecule , materials science , nuclear magnetic resonance , chemistry , condensed matter physics , molecular physics , physics , thermodynamics , organic chemistry , copolymer , quantum mechanics , radical polymerization
The rotational mobility of molecules in glassy polymers was investigated by quantitative simulations of electron spin resonance spectra of nitroxide spin probes with molecules of different sizes. The motional models were determined unambiguously when the experimental and calculated spectra coincided within the level of experimental error. Temperature ranges in which different motional models were applicable were determined. Quasi‐librational movements and the distribution of rotational mobility were found to be necessary for the qualitative description of spin‐probe mobility in glassy polymers. The quantitative and empirical characteristics of rotational mobility were examined. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011