Electrical Conductivity Response to Structural Relaxation of a-PMMA Filled with Carbon Black and Carbon Nanotubes

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F06%3A63504459" target="_blank" >RIV/70883521:28110/06:63504459 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Electrical Conductivity Response to Structural Relaxation of a-PMMA Filled with Carbon Black and Carbon Nanotubes

Original language description

The phenomenon of structural relaxation is mainly investigated by enthalpy or volume isothermal measurements. It is possible to significantly change conductivity of polymers by its blending with conducting filer. In the case of composite based as PMMA/carbon black, CB, percolation threshold is found somewhere around concentration 5 vol. % of CB on carbon nanotubes, when conductivity increases over nine orders comparing to pure PMMA. This fact is usually explained by creating of conductive paths by carbon black particles in insulator polymer matrix. This structure is very sensitive to volume changes implicated creating or destroying of conductivity paths, with strong dispersion in glass transition region. According this, the measurement of electrical conductivity is capable to detect sample changes caused either by thermal expansion but also by isothermal structural relaxation of the material.

Czech name

Odezva v elektrické vodivosti na strukturní relaxaci PMMA plněného uhlíkovými nanotrubicemi

Czech description

Strukturní relaxace je zkoumána pomocí entalpických či objemových dat. Je možné provést i jistá relaxační měření pomocí měření vodivosti kompozitu na bázi PMMA/CB či PMMA/uhlíková nanotrubice. Perkolační práh byl nalezen kolem 5 wt. % a vodivost roste skoncentrací plniva. Vytvořené vodivostní cesty jsou ovlivňovány změnou objemu vzorku vyvolané změnou teploty i relaxačními změnami. Tyto struktury jsou velmi citlivé na tyto změny.

Type

D - Article in proceedings

CEP classification

JJ - Other materials

OECD FORD branch

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Project

<a href="/en/project/GP106%2F06%2FP189" target="_blank" >GP106/06/P189: Adaptation of polymer nanocomposite properties based on carbon nanotubes in respect of thermal stability</a><br>

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2006

Confidentiality

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

Article name in the collection

Polymer Processing Society 22nd Annual Meeting PPS

ISBN

4-9093109-2-6

ISSN

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e-ISSN

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Number of pages

1

Pages from-to

1-1

Publisher name

Polymer Processing Society

Place of publication

Akron

Event location

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Event date

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Type of event by nationality

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UT code for WoS article

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