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Carbon Black-Filled Polymer Blends: A Scanning Probe Microscopy Characterization

Published online by Cambridge University Press:  10 February 2011

Ph. Leclère ,
R. Lazzaroni ,
F. Gubbels ,
F. Calberg ,
Ph. Dubois ,
R. Jérôme  and
J. L. Brédas
Ph. Leclère
Affiliation:
Service de Chimie des Matériaux Nouveaux, Centre de Recherche en Electronique et Photonique Moléculaires, Université de Mons-Hainaut, B-7000 Mons, Belgium
R. Lazzaroni
Affiliation:
Service de Chimie des Matériaux Nouveaux, Centre de Recherche en Electronique et Photonique Moléculaires, Université de Mons-Hainaut, B-7000 Mons, Belgium
F. Gubbels
Affiliation:
Centre d'Etude et de Recherche sur les Macromolécules (CERM), Université de Liège, Institut de Chimie, B-4000 Sart-Tilman, Belgium
F. Calberg
Affiliation:
Centre d'Etude et de Recherche sur les Macromolécules (CERM), Université de Liège, Institut de Chimie, B-4000 Sart-Tilman, Belgium
Ph. Dubois
Affiliation:
Centre d'Etude et de Recherche sur les Macromolécules (CERM), Université de Liège, Institut de Chimie, B-4000 Sart-Tilman, Belgium
R. Jérôme
Affiliation:
Centre d'Etude et de Recherche sur les Macromolécules (CERM), Université de Liège, Institut de Chimie, B-4000 Sart-Tilman, Belgium
J. L. Brédas
Affiliation:
Service de Chimie des Matériaux Nouveaux, Centre de Recherche en Electronique et Photonique Moléculaires, Université de Mons-Hainaut, B-7000 Mons, Belgium
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Abstract

Conducting polymer composites, that consist of a conducting filler randomly distributed throughout an insulating polymer or polymer blend, attract interest in several application fields such as sensors or electromagnetic radiation shielding. The macroscopic electrical resistivity of the filled polyblend strongly depends on the localization of the filler. Here, we investigate the morphology of Carbon Black (CB)-filled polymer blends in order to determine the parameters governing the selective localization of CB in one phase of the blend components or at the interface between the components. The dispersion of the CB particles in the polymer blend is observed by means of Lateral Force Microscopy (LFM) as a function of the blend composition and the load in C.B. The selective localization of CB at the interface enables the reduction of the percolation threshold down to 0.5 wt%; as a result, the mechanical properties of the polymer blend can be fully retained. Different techniques can be used to locate the CB at the interface; we compare their efficiency experimentally.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 457: Symposium V – Nanophase and Nanocomposite Materials II , 1996 , 475
Copyright
Copyright © Materials Research Society 1997

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References

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