✦ LIBER ✦

Fractal structure study of carbon blacks used as conducting polymer fillers

✍ Scribed by L. Salome; F. Carmona

Publisher: Elsevier Science
Year: 1991
Tongue: English
Weight: 551 KB
Volume: 29
Category: Article
ISSN: 0008-6223
DOI: 10.1016/0008-6223(91)90126-4

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✦ Synopsis

We characterize the fractal dimension of various carbon blacks by transmission electron microscope image analysis of aggregates and small-angle neutron scattering of filled polymer samples. The results obtained by these two distinct techniques are in very good agreement and are found close to the prediction of the cluster-cluster aggregation model. Furthermore, we determine the volume fraction of carbon black at the insulating-conducting transition of composite materials elaborated with the same blacks, but we do not find a correlation of this threshold with the fractal dimension of the aggregates. This questions the relevance of the fractal concept in the prediction of the physical propertics of composites.

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