Abstract
New polyurethane cationomers bearing side chain azoaromatic chromophores on non-ionic fragment of hard segments were synthesized and characterized. Their photobehavior in solutions and polymeric films was investigated by electronic absorption spectroscopy and was evaluated comparatively with a non-ionic azourethane model and polyurethane precursor. Under UV irradiation only the polymer solutions showed a typical photochromism, while in film state, the reversible process was impeded even at higher temperatures. By exposure at iodine vapors for 1–2 min, the cis-trans isomerization in irradiated polymer films is possible too.
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Buruiana, E., Buruiana, T., Airinei, A. et al. Synthesis and Some Properties of Polyurethane Cationomers with Side Chain Azoaromatic Chromophores. Polym J 31, 510–515 (1999). https://doi.org/10.1295/polymj.31.510
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DOI: https://doi.org/10.1295/polymj.31.510