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The photo sensitized degradation of polymer system is occasionally used as a means of solving the problem of environmental pollution, photostabilization of polystyrene films using chrom complexes was investigated. Poly styrene films with a thickness of 80μm and contains complexes concentration of 0.05% wt were produced by the casting method with chloroform being the solvent The photostabilization activities of these complexes were determined by monitoring changes in carbonyl,(I CO) and hydroxyl,(I OH) indices and calculating the photodecomposition rate constant (k d), the average molecular weight for the studied films The results obtained showed that the photostabilization activity of polystyrene film in the presence of the complexes as additive follows the trends:

In this work, a pure (PVA) polymer film reinforced with magnesium oxide, graphene oxide poly (o-phenylene diamine) (GO-MgO-PoPDA) was created utilizing the solution casting process in various weight ratios (0, 2, 4, 6, 8, 10 wt%). It was investigated how varied weight ratios of the nanoparticles magnesium oxide (MgO) and graphene oxide (GO) affected the Dielectric Properties of nano composite films. FTIR, SEM,X-RAY were used to characterized the nanocomposite. The results of the dielectric properties showed that the values of the alternating electrical conductivity of the prepared films increase when adding (GO-MgO-PoPDA) nanoparticles and with the increase of the frequency of the applied electric field and the increase of the particle content, while the values of the dielectric constant increase with the increase of each of the content of (GO-MgO- PoPDA) nanoparticles, but it decreases with increasing frequency. Whereas, the dielectric loss coefficient of the prepared films decreases when nanoparticles are added and with increasing frequency.