Rheology as a valuable tool for probing of conductive structures in polyethylene composites

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F25%3A00638008" target="_blank" >RIV/61389013:_____/25:00638008 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Rheology as a valuable tool for probing of conductive structures in polyethylene composites

Popis výsledku v původním jazyce

The rheology of conductive polymer composites has attracted much attention due to the high sensitivity of this method to investigate the formation of conductive particle structures. In this contribution, we evaluated the effect of two specific procedures for the preparation of the single-wall carbon nanotube-filled nanocomposites in terms of their concentration and the quality of the dispersion in the high-density polyethylene matrix. In particular, we focused on the influence of the promising non-covalent modification process using alkylated pyrene resulting in good dispersion in non-polar environments. It was proved that the properties of the nanocomposites were controlled by the modification procedure used. The results obtained proved better dispersion and higher mobility of conductive nanoparticles in the case of the simpler modification procedure used. In addition, the rheological and electrical measurements before and after isothermal annealing in the molten state showed further conductivity increase. This approach allowed us to investigate the formation of conductive structures in a comprehensive manner. The high sensitivity of the measurements in the oscillatory shear flow to the changes in composite microstructure confirms their benefits for probing the conductive structure formation (TN02000067/10-V12).

Název v anglickém jazyce

Rheology as a valuable tool for probing of conductive structures in polyethylene composites

Popis výsledku anglicky

The rheology of conductive polymer composites has attracted much attention due to the high sensitivity of this method to investigate the formation of conductive particle structures. In this contribution, we evaluated the effect of two specific procedures for the preparation of the single-wall carbon nanotube-filled nanocomposites in terms of their concentration and the quality of the dispersion in the high-density polyethylene matrix. In particular, we focused on the influence of the promising non-covalent modification process using alkylated pyrene resulting in good dispersion in non-polar environments. It was proved that the properties of the nanocomposites were controlled by the modification procedure used. The results obtained proved better dispersion and higher mobility of conductive nanoparticles in the case of the simpler modification procedure used. In addition, the rheological and electrical measurements before and after isothermal annealing in the molten state showed further conductivity increase. This approach allowed us to investigate the formation of conductive structures in a comprehensive manner. The high sensitivity of the measurements in the oscillatory shear flow to the changes in composite microstructure confirms their benefits for probing the conductive structure formation (TN02000067/10-V12).

Druh

O - Ostatní výsledky

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/TN02000067" target="_blank" >TN02000067: Nové směry v elektronice pro průmysl 4.0 a medicínu 4.0</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů