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Issue 2, 2008
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Enhanced dielectric properties and positive temperature coefficient effect in the binary polymer composites with surface modified carbon black

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Abstract

We report a new kind of binary polymer [polypropylene (PP) and polyvinylidene fluoride (PVDF)] matrix composite containing surface modified carbon black (CB) by employing titanate coupling agent (NDZ-102) and silane coupling agent (KH550). Significant enhancement of dielectric properties (conductivity and permittivity) and positive temperature coefficient effect (PTC) were observed in the CB-PP/PVDF composites when the concentration of CB reaches a critical value. These could be attributed mainly to the bridge-linked role of coupling agents between the CB and the binary polymer, which also improve the CB dispersion in the composites. Compared with KH550, NDZ-102 can form a flexile and thin interface layer, inducing a more effective increase in conductivity of the composites. Additionally, the composite with NDZ-102 modified CB displays excellent PTC stability.

Graphical abstract: Enhanced dielectric properties and positive temperature coefficient effect in the binary polymer composites with surface modified carbon black

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Publication details

The article was received on 10 Sep 2007, accepted on 05 Nov 2007 and first published on 14 Nov 2007


Article type: Paper
DOI: 10.1039/B713857A
Citation: J. Mater. Chem., 2008,18, 229-234
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    Enhanced dielectric properties and positive temperature coefficient effect in the binary polymer composites with surface modified carbon black

    H. Xu, Z. Dang, M. Jiang, S. Yao and J. Bai, J. Mater. Chem., 2008, 18, 229
    DOI: 10.1039/B713857A

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