Abstract:

Nanocomposites have many applications such: optical integrated circuits, sensors, coatings, medical devices.. etc.  So, this paper aims  to preparation of  new type (PVA-PEG-PVP- MgO, CoO) nanocomposites to production new nanocomposites use in many. applications. The nanocomposites were prepared by using casting technique. The polymers was mixed with different weight percentages are (PVA0.90-PEG0.05-PVP0.05). The nanomaterials (MgO and CoO) were added to polymers composites with concentrations are (0, 2, 4 and 6) wt.%. The results show  that the absorbance (A) of nanocomposites is increased with increase of concentrations of magnesium oxide and cobalt oxide nanoparticles.  The optical constants (absorption coefficient (α), extinction coefficient (k), refractive index (n), real and imaginary dielectric constants (ε1 and ε2)) of nanocomposites are increasing with the increase of the weight percentages of magnesium oxide and cobalt oxide nanoparticles. The energy gap (Eg) of (PVA-PEG-PVP) decreases with the increase of the weight percentages of magnesium oxide and cobalt oxide nanoparticles.  

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