| Autor: |
Behera, Sushil Kumar, Panda, Maheswar, Pradhan, Ranjan Kumar |
| Předmět: |
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| Zdroj: |
Modern Physics Letters B; 1/20/2024, Vol. 38 Issue 2, p1-12, 12p |
| Abstrakt: |
Polymer Nanocomposites (PNC) comprising polyvinylidene fluoride (PVDF)/Multi-walled Carbon Nanotubes (MWCNT) were studied. The structural composition and thermal stability were confirmed from XRD and DSC/TGA data, respectively. The extent of distribution of MWCNT in the PNC increases and the clustering of MWCNT also increases with an increase in the volume fraction of MWCNT ( f MWCNT ) , as confirmed by FESEM. The PNC shows an insulator-to-metal transition (IMT), with both non-universal percolation threshold (f c) of f MWCNT = 0. 0 0 6 and scaling exponents [ s = 0. 3 6 ± 0. 0 3 , s ′ = 1. 2 6 ± 0. 1 ] , respectively, attributed to adhesiveness/cold pressing and the higher aspect ratio/conductivity of MWCNT. Modulus spectroscopy confirms a non-Debye type universal relaxation behavior (β = 0. 5 4) only for the percolative sample due to Maxwell–Wagner–Sillars/interfacial polarization, while only dipolar relaxation was probed or the samples below f c . The f c with static effective dielectric constant ∼ 2 1 1 and low tan δ may be suitable for charge storage applications. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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