الفهرس 
Historical background of polymerOnly 14 pages are availabe for public view
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Abstract
casting method with different ratios of metal nanoparticles (0.04, 0.08, and 0.1 wt. %) for each aluminum, copper, and zinc. Thin films were synthesized to achieve good optical and electrical properties for optoelectronic photonic device applications such as solar cells and energy storage applications. characterization was carried out by XRD, FTIR, SEM, TEM, DSC, UV-vis, Dielectric spectroscopy, and PALS to investigate thermal, dielectric, and linear -nonlinear optical properties beside electrical and microstructure properties of nanocomposite films. The XRD results for PVA/Al NPs the degree of crystallinity of the composite is largely decreased from 42% for pure PVA to 22% by increasing Al NPs content. For PVA/Cu NPs also the degree of crystallinity is noticed to decrease to 28% by increasing Cu NPs, another technique is used for calculating the values of full width at half maximum (FWHM) of the peak (002) which represents the crystalline phase changed from 2.04° to 1.36° by increasing the copper content. Also, in PVA/Zn NPs, degree of crystallinity (Xc) is decreased from 42% to 17.3% by increasing Zn concentration in the polymeric matrix. FTIR absorption spectra for PVA/Al NPs ,it is seen that there is a decrease and change in the intensity and the positions of vibrational peaks of pure PVA by addition of Al NPs. These changes in position and broadening arise from the formation of cross-link between Al-NPs and oxygen atom in PVA. These results indicate the presence of interaction between PVA matrix and Al NPs and the Al NPs transport through the chain of PVA. For PVA/Cu NPs films, the results reveal that the absorption band frequencies are shifted to different frequencies due to the Cu NPs content. There is no appearance of any absorption band related to Cu nano-metal in
PVA/Cu composites which reveals the fact that PVA has a dense molecular packing and tight intermolecular hydrogen bonding compared to Cu. For PVA/Zn NPs films It is clear there exists a broad absorption band at 3488– 2997 cm−1 for the pure PVA.