Development, thermal and dielectric investigations of $PVDF-Y_2O_3$ polymer nanocomposite films
Taha, T. A. Mahmoud, Mohammed H. Hamdeh, Hussein H.
Taha, T. A.
Mahmoud, Mohammed H.
Hamdeh, Hussein H.
Other Names
Location
Time Period
Advisors
Original Date
Digitization Date
Issue Date
2021-04-03
Type
Article
Genre
Keywords
PVA nanocomposites,Refractive index,Optical susceptibility,Optical conductivity
Subjects (LCSH)
Citation
Taha, T. A., Mahmoud, M. H., & Hamdeh, H. H. (2021). Development, thermal and dielectric investigations of PVDF-Y2O3 polymer nanocomposite films. Journal of Polymer Research, 28(5) doi:10.1007/s10965-021-02508-y
Abstract
This work involves preparing $PVDF-Y_2O_3$ polymer nanocomposites to improve thermal and dielectric properties. X-ray diffraction, SEM, FTIR, TGA and dielectric measurements were applied for these films. The cubic crystal structure of $Y_2O_3$ appeared in XRD spectra and the average size was 39 nm. The sample with a concentration of 1.0 wt% achieved the highest intensity of the β-phase peak at 20.2°. The surface images of these samples were of high homogeneity as recorded by SEM microscopy. FTIR analysis showed absorption bands correlated with α, β and γ-phase. The percentage in β-phase in the nanocomposite films improved with an increase in the $Y_2O_3$ ratio from 1.0 to 3.0 wt%, especially at 1.0 wt%. From TGA analyzes, it was confirmed that the thermal stability improved with an increase in the yttrium oxide percentage. All of the nanocomposite films had higher values of ΔS, ΔH and ΔG than the pure PVDF film. The dielectric permittivity and energy density of the nanocomposite films improved, especially at 1.0 wt%. The energy density at 0.1 Hz has the values $1.08 x 10^{-3}, 2.11 x 10^{-3}, 1.81 x 10^{-3}$ and $1.75 x 10^{-3} J/m^3$ at the ratios 0.0, 1.0, 2.0 and 3.0 wt% of This work involves preparing $PVDF-Y_2O_3$ polymer nanocomposites to improve thermal and dielectric properties. X-ray diffraction, SEM, FTIR, TGA and dielectric measurements were applied for these films. The cubic crystal structure of $Y_2O_3$ appeared in XRD spectra and the average size was 39 nm. The sample with a concentration of 1.0 wt% achieved the highest intensity of the β-phase peak at 20.2°. The surface images of these samples were of high homogeneity as recorded by SEM microscopy. FTIR analysis showed absorption bands correlated with α, β and γ-phase. The percentage in β-phase in the nanocomposite films improved with an increase in the $Y_2O_3$ ratio from 1.0 to 3.0 wt%, especially at 1.0 wt%. From TGA analyzes, it was confirmed that the thermal stability improved with an increase in the yttrium oxide percentage. All of the nanocomposite films had higher values of ΔS, ΔH and ΔG than the pure PVDF film. The dielectric permittivity and energy density of the nanocomposite films improved, especially at 1.0 wt%. The energy density at 0.1 Hz has the values $1.08 x 10^{-3}, 2.11 x 10^{-3}, 1.81 x 10^{-3}$ and $1.75 x 10^{-3} J/m^3$ at the ratios 0.0, 1.0, 2.0 and 3.0 wt% of This work involves preparing $PVDF-Y_2O_3$ polymer nanocomposites to improve thermal and dielectric properties. X-ray diffraction, SEM, FTIR, TGA and dielectric measurements were applied for these films. The cubic crystal structure of $Y_2O_3$ appeared in XRD spectra and the average size was 39 nm. The sample with a concentration of 1.0 wt% achieved the highest intensity of the β-phase peak at 20.2°. The surface images of these samples were of high homogeneity as recorded by SEM microscopy. FTIR analysis showed absorption bands correlated with α, β and γ-phase. The percentage in β-phase in the nanocomposite films improved with an increase in the $Y_2O_3$ ratio from 1.0 to 3.0 wt%, especially at 1.0 wt%. From TGA analyzes, it was confirmed that the thermal stability improved with an increase in the yttrium oxide percentage. All of the nanocomposite films had higher values of ΔS, ΔH and ΔG than the pure PVDF film. The dielectric permittivity and energy density of the nanocomposite films improved, especially at 1.0 wt%. The energy density at 0.1 Hz has the values $1.08 x 10^{-3}, 2.11 x 10^{-3}, 1.81 x 10^{-3}$ and $1.75 x 10^{-3} J/m^3$ at the ratios 0.0, 1.0, 2.0 and 3.0 wt% of Y2O3. The loss tangent values for these nanocomposite films decreased at low frequencies while increased at higher frequencies as the content of $Y_2O_3$ increased. A marked improvement in εs, ε∞, Δε, AC and DC conductivity was observed with an increase in $Y_2O_3$ content.. The loss tangent values for these nanocomposite films decreased at low frequencies while increased at higher frequencies as the content of $Y_2O_3$ increased. A marked improvement in εs, ε∞, Δε, AC and DC conductivity was observed with an increase in $Y_2O_3$ content.. The loss tangent values for these nanocomposite films decreased at low frequencies while increased at higher frequencies as the content of $Y_2O_3$ increased. A marked improvement in εs, ε∞, Δε, AC and DC conductivity was observed with an increase in $Y_2O_3$ content.
Table of Contents
Description
Click on the DOI link to access the article (may not be free).
Publisher
Springer
Journal
Book Title
Series
Journal of Polymer Research;Vol. 28, Iss. 5
Digital Collection
Finding Aid URL
Use and Reproduction
Archival Collection
PubMed ID
DOI
ISSN
1022-9760
1572-8935
1572-8935