Artigo 12 – Vol. 6 N. 2


Effect of graphene content on thermal degradation of PTFE

Autores
A.D. Pienaar, L. van Rooyen, H. Bissett, J. Karger-Kocsis
Recebido em
 05 de Janeiro de 2017
Aceito em
 10 de Maio de 2017
Publicado em
 15 de Junho de 2017
DOI
 10.18362/bjta.v6.i2.12
Páginas
 7 a 12
Keywords
PTFE; thermal degradation; Sestak-Berggren equation; graphene nanocomposites

 

Resumo

In this work we report on the effect of graphene nanoplatelet inclusion on the thermal degradation of polytetrafuoroethylene (PTFE) in nitrogen. PTFE/graphene nanocomposites, containing up to 4 vol% graphene were produced by solution-assisted blending followed by sintering. Decomposition parameters were determined by direct fitting of the Sestak-Berggren equation to the experimental data. It was found that the activation energy of thermal decomposition increased up to as much as 20% and was practically independent of the graphene content in the studied PTFE/graphene nanocomposites. This was attributed to the tortuosity of the graphene layers hampering the diffusion of the gaseous decomposition products.
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