Reduced percolation concentration in polypropylene/expanded graphite composites: effect of viscosity and polypyrrole
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F15%3A00441927" target="_blank" >RIV/61389013:_____/15:00441927 - isvavai.cz</a>
Výsledek na webu
<a href="http://dx.doi.org/10.1002/APP.41994" target="_blank" >http://dx.doi.org/10.1002/APP.41994</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/APP.41994" target="_blank" >10.1002/APP.41994</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Reduced percolation concentration in polypropylene/expanded graphite composites: effect of viscosity and polypyrrole
Popis výsledku v původním jazyce
With the goal to obtain material combining electrical and thermal conductivity at low filler loadings, composites based on polypropylenes (PP) and expanded graphite (EG) have been prepared. The effects of matrix viscosity and of coating the EG particleswith polypyrrole (PPy, EG/PPy?=?37.5/62.5 by weight) on the EG dispersibility and formation of percolation structures have been analyzed. When increasing the EG amount from 6 to 8 wt %, the electrical conductivity of PP/EG composites increased by 7?9 orders of magnitude, independent of matrix viscosity. When EG-PPy is added, percolation was observed between 8 and 12 wt % EG-PPy (3 and 4.5 wt % EG) in case of PP with higher viscosity and 6 wt % EG (2.25 wt % EG) in case of PP with lower viscosity, exhibiting a strong synergistic effect of EG and PPy in the latter case. In contrast, PPy does not contribute to reduction of thermal percolation concentration. Thermal percolation is observed at 8 wt % EG in PP/EG composites, but no percolatio
Název v anglickém jazyce
Reduced percolation concentration in polypropylene/expanded graphite composites: effect of viscosity and polypyrrole
Popis výsledku anglicky
With the goal to obtain material combining electrical and thermal conductivity at low filler loadings, composites based on polypropylenes (PP) and expanded graphite (EG) have been prepared. The effects of matrix viscosity and of coating the EG particleswith polypyrrole (PPy, EG/PPy?=?37.5/62.5 by weight) on the EG dispersibility and formation of percolation structures have been analyzed. When increasing the EG amount from 6 to 8 wt %, the electrical conductivity of PP/EG composites increased by 7?9 orders of magnitude, independent of matrix viscosity. When EG-PPy is added, percolation was observed between 8 and 12 wt % EG-PPy (3 and 4.5 wt % EG) in case of PP with higher viscosity and 6 wt % EG (2.25 wt % EG) in case of PP with lower viscosity, exhibiting a strong synergistic effect of EG and PPy in the latter case. In contrast, PPy does not contribute to reduction of thermal percolation concentration. Thermal percolation is observed at 8 wt % EG in PP/EG composites, but no percolatio
Klasifikace
Druh
J<sub>x</sub> - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
CEP obor
CD - Makromolekulární chemie
OECD FORD obor
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Návaznosti výsledku
Projekt
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Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2015
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Journal of Applied Polymer Science
ISSN
0021-8995
e-ISSN
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Svazek periodika
132
Číslo periodika v rámci svazku
20
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
12
Strana od-do
"41994_1"-"41994_12"
Kód UT WoS článku
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EID výsledku v databázi Scopus
2-s2.0-84923572761