| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Ezzeddine, Imene
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (1/1 displayed)
Places of action
| Organizations | Location | People |
|---|
article
Molecular dynamics of poly(ε‐caprolactone)/beidellite organoclay bionanocomposites obtained by in‐situ polymerization highlighted by dielectric relaxation spectroscopy
Abstract
<jats:title>Abstract</jats:title><jats:sec><jats:label/><jats:p>Nanocomposites of poly(ε‐caprolactone) (PCL) reinforced by an organomodified beidellite (BDT) with 3% of cetyltrimethylammonium bromide (CTAB) (labeled PCL/3CTA‐BDT) were prepared by varying the content of filler (1, 2, 3, and 5 wt%). Their molecular dynamics were investigated by broadband dielectric spectroscopy at temperatures ranging from 0 to 40°C and a frequency window from 10<jats:sup>−1</jats:sup> to 10<jats:sup>6</jats:sup> Hz. Three relaxation processes were detected for unfilled PCL: electrode polarization (EP), the Maxwell–Wagner–Sillars (MWS) polarization, and the α‐relaxation. The incorporation of the filler induced the emergence of a fourth process at high frequency of dipolar origin labeled as interfacial polarization (IP). Fitting the data with the Havriliak–Negami model as well as a study of the relaxation time variation with temperature demonstrated the noncooperative nature of the IP process. Activation energy and dielectric strength values demonstrated that the PCL/3CTA‐BDT with 3 wt% of filler showed a higher quality of dispersion and better interfacial features compared to those with other filler contents (2 and 5 wt%). This work highlights the challenges of dielectric green nanocomposites used for capacitors (storage energy) and cable/wire insulation.</jats:p></jats:sec><jats:sec><jats:title>Highlights</jats:title><jats:p><jats:list list-type="bullet"> <jats:list-item><jats:p>The various samples were analyzed using broadband dielectric spectroscopy.</jats:p></jats:list-item> <jats:list-item><jats:p>Relaxation processes in pure matrix: EP, MWS, and α‐relaxation.</jats:p></jats:list-item> <jats:list-item><jats:p>Incorporation of the filler induced the emergence of interfacial polarization (IP).</jats:p></jats:list-item> <jats:list-item><jats:p>Noncooperative behavior of the IP process.</jats:p></jats:list-item> <jats:list-item><jats:p>3 wt% loading showed a higher quality of dispersion and interfacial features.</jats:p></jats:list-item> </jats:list></jats:p></jats:sec>