Influence of Cr2O3 nanoparticles on the physical properties of polyvinyl alcohol
作者： A. Hassen , A. M. El Sayed , W. M. Morsi , S. El-Sayed
DOI: 10.1063/1.4764864
关键词:
摘要: Nano-sized chromium oxide (Cr2O3) was synthesized by sol-gel method and mixed with polyvinyl alcohol (PVA) to produce nanocomposite films. Scanning electron microscopy (SEM) used observe the morphology dispersion of Cr2O3 on surface PVA X-ray diffraction (XRD) performed nano-sized Cr2O3, pure PVA, Cr2O3/PVA composites. Based results both XRD high-resolution transmission (HR-TEM), average particle size ≈ 46 nm. Differential scanning calorimetry (DSC) showed that thermal stability degree crystallinity were reinforced addition nanoparticles. The absorbance extinction coefficients composites studied in UV-vis range compared those PVA. optical energy band gap, Eg, calculated. Dielectric constant, e′, dielectric loss modulus, M″, ac conductivity, σac, all samples measured within temperature frequency ranges 300–468 K ...
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