OPTIC AND SPECTRAL CHARACTERISTICS OF SOME AROMATIC COPOLYETHERS EMBEDDED IN POLYMER MATRICES

Photochromic properties of copolyethers based on bisphenol-A 4,4'-dihy droxydiphenyl, 4,4'-dihydroxy-azobenzene, and 3,3-bis(chloromethyl)oxe tane (BCMO) both embedded in a polymer matrix-(polyvinyl alcohol, PVA) and in the pure state, deposed on quartz disks, have been studied. Th e polarization spectra of the studied compounds have been obtained. Fr om the analysis of the absorption spectra in polarized light, it has b een established that the oscillator responsible for the appearance of the electronic absorption band executes vibrations with an average ori entation along the stretching direction of the studied foils.