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Behavior of azo dyes dispersed in fluid polymeric matrices with different rheological properties. A kinetic study of the cis‐trans isomerization of 3′‐nitro‐4‐diethylamino azobenzene in polyethylenoxides
Author(s) -
DubiniPaglia Ernestina,
Beltrame Pier Luigi,
Marcandalli Bruno,
Seves Alberto,
Vicini Loredana
Publication year - 1988
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.1988.070360314
Subject(s) - isomerization , azobenzene , kinetics , polymer , rheology , nitro , azo compound , viscosity , kinetic energy , polymer chemistry , chemistry , materials science , photochemistry , organic chemistry , catalysis , composite material , physics , alkyl , quantum mechanics
The thermal cis‐trans isomerization of 3′‐nitro‐4‐diethylaminoazobenzene in seven polyethyleneoxides at different molecular weight has been studied kinetically in the temperature range 35–70°C. The dependence of the reaction rate on the polymer polarity and viscosity is discussed. The kinetics of the isomerization of the dye dispersed in the fluid polymeric matrix was found to be a useful probe of the structural features of the polymer.