عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Photo chromic compounds have obtained excessive attention because of their ability for color changes caused by responding to the induced stimulation through UV irradiation. These materials have a wide variety, however the photo chromic ones such as spiro compounds (spiropyran and spiroxazin), di azo and di arylethen are appropriate candidates for incorporation into the polymeric matrices. Photo chromic polymers are interesting because of the transfer of responsiveness behavior of the photo chromic compounds involved into the polymer. They are capable of changing the optical behavior in addition to chemical and physical properties of the corresponding polymer phase. It is notable that this behavior through UV and Vis irradiations is reversible for several times. These features are influenced by the chemical structure, glass transition temperature (Tg) and morphological properties of the polymer. In addition, photo chromic properties were increased by decrees of Tg trough increase of the mobility from polymer chains.