Abstract
CdS/PVA nanocomposites have been prepared by solution casting method where 0.5, 1, 2 and 3wt% of CdS nanoparticles (NPs) were added to polyvinyl alcohol (PVA) polymer as filler. The structure identification of PVA and CdS/PVA nanocomposites films was carried out by the X-ray diffraction (XRD) and transmission electron microscopy (TEM). The average particle size of CdS in PVA matrix was in nano-scale and increases gradually with the increasing of CdS NPs ratio. The thermal stability of PVA and CdS/PVA films has been evaluated using thermogravimetric analysis (TGA). Mechanical properties (tensile strength and elongation) of CdS/PVA films have been discussed in terms of the dispersion of CdS NPs into PVA polymer matrix and the ratio of CdS NPs. PVA and CdS/PVA films all of them have direct optical band gap which was decreased by increasing of CdS NPs ratio.The effect of concentration of the filler particles (CdS NPs) and γ-irradiation, with different doses on the thermal stability, mechanical properties and optical band gap of CdS/PVA nanocomposites films has been studied.
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