Publication Date:
2018-03-14
Description:
The structural, optical, and thermal properties of PVC/SnO 2 nanocomposites were investigated. XRD patterns were used to explore the structures of these prepared samples. Optical UV–Vis measurements were analyzed to calculate the spectroscopic optical constants of the prepared PVC/SnO 2 nanocomposites. Both direct and indirect optical band gaps decreased with increasing SnO 2 content. The refractive index, high frequency dielectric constant, plasma frequency, and optical conductivity values increased with SnO 2 . The single oscillator energy increased from 5.64 to 10.97 eV and the dispersion energy increased from 6.35 to 19.80 eV with the addition of SnO 2 . The other optical parameters such as optical moments, single oscillator strength, volume energy loss, and surface energy loss were calculated for different SnO 2 concentrations. Raman spectra of the PVC/SnO 2 nanocomposite films revealed the characteristic vibrational modes of PVC and surface phonon modes of SnO 2 . The thermal stability of PVC/SnO 2 nanocomposite films was studied using DTA and thermogravimetric analysis. The glass transition ( T g ) values abruptly changed from 46 °C for PVC to an average value of 59 °C for the polymer films doped with 2.0, 4.0, and 6.0 wt% SnO 2 . The weight loss decreased as the SnO 2 concentration increased in the temperature range of 350–500 °C, corresponding to enhanced thermal stability.
Print ISSN:
0947-8396
Electronic ISSN:
1432-0630
Topics:
Technology
,
Physics
