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Thermal, dielectrical and mechanical response of α and β-poly(vinilydene fluoride)/Co-MgO nanocomposites.

Paleo AJ, Martínez-Boubeta C, Balcells L, Costa CM, Sencadas V, Lanceros-Mendez S - Nanoscale Res Lett (2011)

Bottom Line: Nanocomposites of the self-forming core-shell Co-MgO nanoparticles, which were of approximately 100 nm in diameter, and poly(vinylidene fluoride) (PVDF) polymer have been prepared.When the polymer is crystallized in the α-phase, the introduction of the nanoparticles leads to nucleation of the γ-phase of PVDF, increasing also the melting temperature of the polymer.With the introduction of the Co-MgO particles, the dielectric constant of the material slightly increases and the storage modulus decreases with respect to the values obtained for the pure polymer.

View Article: PubMed Central - HTML - PubMed

Affiliation: IPC - Institute for Polymers and Composites, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal. antonio.vieito@dep.uminho.pt.

ABSTRACT
Nanocomposites of the self-forming core-shell Co-MgO nanoparticles, which were of approximately 100 nm in diameter, and poly(vinylidene fluoride) (PVDF) polymer have been prepared. When the polymer is crystallized in the α-phase, the introduction of the nanoparticles leads to nucleation of the γ-phase of PVDF, increasing also the melting temperature of the polymer. With the introduction of the Co-MgO particles, the dielectric constant of the material slightly increases and the storage modulus decreases with respect to the values obtained for the pure polymer.

No MeSH data available.


FTIR spectra of the Co-MgO PVDF nanocomposites crystallized from the melt (a), and crystallized at room temperature (b).
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Figure 1: FTIR spectra of the Co-MgO PVDF nanocomposites crystallized from the melt (a), and crystallized at room temperature (b).

Mentions: Figure 1a shows FTIR measurements for samples crystallized from the melt. It is observed that increasing the concentration of the nanoparticles induces nucleation of the γ-polymorph [9,10]. In contrast, when the solution crystallizes at room temperature, the electroactive β-phase is obtained; though the presence of nanoparticles modifies the polar crystal PVDF structure, as can be surmised from the presence of α-domains in Figure 1b.


Thermal, dielectrical and mechanical response of α and β-poly(vinilydene fluoride)/Co-MgO nanocomposites.

Paleo AJ, Martínez-Boubeta C, Balcells L, Costa CM, Sencadas V, Lanceros-Mendez S - Nanoscale Res Lett (2011)

FTIR spectra of the Co-MgO PVDF nanocomposites crystallized from the melt (a), and crystallized at room temperature (b).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211319&req=5

Figure 1: FTIR spectra of the Co-MgO PVDF nanocomposites crystallized from the melt (a), and crystallized at room temperature (b).
Mentions: Figure 1a shows FTIR measurements for samples crystallized from the melt. It is observed that increasing the concentration of the nanoparticles induces nucleation of the γ-polymorph [9,10]. In contrast, when the solution crystallizes at room temperature, the electroactive β-phase is obtained; though the presence of nanoparticles modifies the polar crystal PVDF structure, as can be surmised from the presence of α-domains in Figure 1b.

Bottom Line: Nanocomposites of the self-forming core-shell Co-MgO nanoparticles, which were of approximately 100 nm in diameter, and poly(vinylidene fluoride) (PVDF) polymer have been prepared.When the polymer is crystallized in the α-phase, the introduction of the nanoparticles leads to nucleation of the γ-phase of PVDF, increasing also the melting temperature of the polymer.With the introduction of the Co-MgO particles, the dielectric constant of the material slightly increases and the storage modulus decreases with respect to the values obtained for the pure polymer.

View Article: PubMed Central - HTML - PubMed

Affiliation: IPC - Institute for Polymers and Composites, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal. antonio.vieito@dep.uminho.pt.

ABSTRACT
Nanocomposites of the self-forming core-shell Co-MgO nanoparticles, which were of approximately 100 nm in diameter, and poly(vinylidene fluoride) (PVDF) polymer have been prepared. When the polymer is crystallized in the α-phase, the introduction of the nanoparticles leads to nucleation of the γ-phase of PVDF, increasing also the melting temperature of the polymer. With the introduction of the Co-MgO particles, the dielectric constant of the material slightly increases and the storage modulus decreases with respect to the values obtained for the pure polymer.

No MeSH data available.