Z-E isomerization of azobenzene based amphiphilic poly(urethane-urea)s: Influence on the dynamic mechanical properties and the effect of the self-assembly in solution on the isomerization kinetics

Amphiphilic, semicrystalline and flexible poly(urethane-urea)s (PUU) containing azo groups in the main chain are capable of self-assembly in solution, which strongly influences the kinetics of the photoisomerization, and their relaxation spectra differ for Z and E-isomers.