Behavior of azo dyes dispersed in fluid polymeric matrices with different rheological properties. A kinetic study of thecis‐transisomerization of 3′‐nitro‐4‐diethylamino azobenzene in polyethylenoxides

摘要

AbstractThe thermalcis‐transisomerization 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