Electrical and mechanical characterization of a flexible conducting composite

Composite films made of poly(vinylidene fluoride) (PVDF) and conducting particles of carbon black (CB) were prepared using a hot press. Using different volume fractions of CB filler, electrical properties of the samples were analyzed with current–voltage (I × V) measurements and impedance spectrosco...

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Bibliographic Details
Published inPolymer bulletin (Berlin, Germany) Vol. 72; no. 7; pp. 1787 - 1797
Main Authors Deniz, W. D. S., Sousa, E. A., Arlindo, E. P. S., Sakamoto, W. K., Fuzari, G. C.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.07.2015
Springer Nature B.V
Subjects
Carbon black
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Circuit diagrams
Circuits
Complex Fluids and Microfluidics
Electric currents
Electrical properties
Electrodes
Fillers
Fractions
Hot pressing
Mechanical properties
Microscopy
Modulus of elasticity
Organic Chemistry
Original Paper
Percolation theory
Physical Chemistry
Polymer Sciences
Polymers
Polyvinylidene fluorides
Simulation
Soft and Granular Matter
Tensile strength
Vinylidene fluoride
Conductivity
Mechanical properties
Carbon black
Composite
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Summary:Composite films made of poly(vinylidene fluoride) (PVDF) and conducting particles of carbon black (CB) were prepared using a hot press. Using different volume fractions of CB filler, electrical properties of the samples were analyzed with current–voltage (I × V) measurements and impedance spectroscopy. To help the discussion, percolation theory and simulation circuits based on Colie diagrams were used. The percolation threshold was found at 3 vol% of CB. At these volume fractions of filler, scanning electron microscopy (SEM) images showed connected particles in the polymer matrix, while in the higher volume content of filler, the particles started to form clusters. Furthermore, it was observed that increasing volume fractions up to 3 vol%, the Young’s modulus and the tensile strength of the composite film were higher than that of the pure polymer, although the rupture strain was decreased. Composite films with 3 vol% of CB showed optimized electrical and mechanical properties and may be useful as an electrostatic dissipater.
ISSN:0170-0839
1436-2449
DOI:10.1007/s00289-015-1371-y