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Here we present a study of two copolyimides containing oxadiazole and perylene units in the main chain with emphasis on their photo-optical properties and electrochemical behavior. Upon irradiation with light of different wavelengths these polymers showed photoluminescence maxima in the UV, blue or green-yellow spectral range. Cyclic voltammetry was performed in order to obtain information about the...
Thermostable polyimides based on perylenetetracarboxylic dianhydride and aromatic diamines containing oxadiazole rings were prepared and thin films were made therefrom. Dark-red, opaque coatings resulted having strong adhesion to the glass support. The composition of these polyimide films was analysed using X-ray photoelectron spectroscopy (XPS). The dynamo-mechanical and dielectric behaviour of the...
Heterocyclic polyimides based on bis (ketonaphthalic) dianhydrides and aromatic diamines containing oxadiazole rings were prepared and their dielectric properties were investigated. The dielectric constant values, measured at room temperature and in the frequency domain of 1 Hz-1MHz, were in the range of 2.7-3.1, being lower or comparable with those of commercial polyimide film Kapton which is one...
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