Rheological and electrical properties of carbon black and carbon fiber filled cyclic olefin copolymer composites

Kaşgöz, Alper; Akın, Dincer; Durmuş, Ali

doi:10.1016/j.compositesb.2014.02.017

Cited by 48 publications

(33 citation statements)

References 35 publications

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“…Besides, such platform in the low frequency grows taller and taller with increasing CB content, and this is reflection of enhancement in the rigidness of the composites. When CB content reaches 10 % and above, the storage modulus presents the solid-like behaviors, i.e., the storage modulus is independent on the frequency, which is attributed to the fact that the relaxation of polymer chains is inhibited [14,15]. Figure 2a and b describe the variations of the complex viscosity of the LCF and SCF composites as a function of CB content.…”

Section: Rheological Propertiesmentioning

confidence: 98%

Elevated conductivity and electromagnetic interference shielding effectiveness of PVDF/PETG/carbon fiber composites through incorporating carbon black

et al. 2015

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Along with the electronic products entering people's life, the electromagnetic radiation is becoming a serious problem threatening human health. Consequently, the aim of this paper is fabricating the electromagnetic shielding materials containing carbon fiber (CF), carbon black (CB), poly(vinylidene fluoride) (PVDF) and poly(ethylene terephthalateco-1,4-cylclohexylenedimethylene terephthalate) (PETG). By adjusting CB content, the composite with high electromagnetic interference shielding effectiveness (EMI SE) was achieved. Additionally, the effects of CB on the rheological, dynamic mechanical properties, and electrical resistivity of PVDF/PETG/CF composites were investigated in detail. That CB formed the conductive networks in the PVDF/PETG/CF/CB composite at 5 % of CB and above led to the reduction in electrical resistivity and the augment of the modulus as well as the glass transition temperature of PETG. From the electrical resistivity and storage modulus points of view, the short CF exhibited the better synergistic effect with CB than the long CF did. But the lowest electrical resistivity (0.39 Ω.cm) occurred in the long CF based composites containing 15 % of CB, and its EMI SE is determined to above 30 dB over a frequency of 0.1 to 1500 MHz.

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Section: Rheological Propertiesmentioning

confidence: 98%

Elevated conductivity and electromagnetic interference shielding effectiveness of PVDF/PETG/carbon fiber composites through incorporating carbon black

et al. 2015

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“…where s 0 is the bulk electrical conductivity of the filler, m is the filler mass fraction, m c is the electrical percolation threshold, and t is the universal critical exponent describing the rapid variation of s near percolation threshold (m c ) [38,39]. The percolation value was 0.09 for PEEK/CB composites and 0.10 for TPI/CB composites, as shown in Fig.…”

Section: Electrical Propertiesmentioning

confidence: 99%

High-performance conductive materials based on the selective location of carbon black in poly(ether ether ketone)/polyimide matrix

Gao

Zhang

Lin

et al. 2015

Composites Part B: Engineering

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“…[11][12][13][14][15][16][17][18][19][20][21][22] Based on the physical property and electrical conductivity data reported in these works, CNT and graphene can be especially classified as high performance fillers since they allow preparing of CPCs with enhanced properties. [11][12][13][14][15][16][17][18][19][20][21][22] Based on the physical property and electrical conductivity data reported in these works, CNT and graphene can be especially classified as high performance fillers since they allow preparing of CPCs with enhanced properties.…”

Section: Introductionmentioning

confidence: 99%

“…This phenomenon is called as "synergic effect of filler" and based on the augmenting of filler contacts to form higher number of conducting pathway. 15,[35][36][37][38] On the other hand, investigation of electrical properties of CPCs depending on the variation of compositional and microstructural properties, specifically aspect ratio, dispersion and orientation of fillers, polymer-filler, and filler-filler interactions etc., of these materials is another important research area.…”

Section: Introductionmentioning

confidence: 99%

Effects of size and shape originated synergism of carbon nano fillers on the electrical and mechanical properties of conductive polymer composites

Kaşgöz

Akın

Durmuş

2015

J of Applied Polymer Sci

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In this study, microstructural features, mechanical properties, and electrical conductivity behaviors of thermoplastic composites prepared by using of cyclic olefin copolymer (COC) as matrix and various types of carbon nano materials, expanded graphite (EG), carbon nanofiber (CNF), and multi walled carbon nanotubes (CNT) as conductive fillers were investigated. Effects of using of double and triple filler combinations on the electrical properties of composites were also quantified in detail by measuring the bulk resistance of samples under alternating current with an impedance spectrometer. The electrical percolation values of fillers were found to be 20, 10, and 5 phr for the series of composites prepared with the EG, CNF, and CNT, respectively. It was obtained that the bulk resistances of percolated samples were dramatically decreased from 10 14 ohm.cm to 10 3 210 4 ohm.cm. On the other hand, it was also found that the using of double and triple filler combinations provided much lower (about 10 1 ohm.cm) bulk resistance which corresponded to higher conductivity values than the highly filled composites including of 30 and 40 phr of EG. Based on the DMA measurements and the quantifying of elastic modulus values of composites in the rubbery region, it was found that the reinforcing effects of carbon nano fillers on the elastic modulus of composites decreased in the order of CNT>CNF>EG, depending on the aspect ratio (A f ) values of fillers into the matrix.

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Rheological and electrical properties of carbon black and carbon fiber filled cyclic olefin copolymer composites

Cited by 48 publications

References 35 publications

Elevated conductivity and electromagnetic interference shielding effectiveness of PVDF/PETG/carbon fiber composites through incorporating carbon black

Elevated conductivity and electromagnetic interference shielding effectiveness of PVDF/PETG/carbon fiber composites through incorporating carbon black

High-performance conductive materials based on the selective location of carbon black in poly(ether ether ketone)/polyimide matrix

Effects of size and shape originated synergism of carbon nano fillers on the electrical and mechanical properties of conductive polymer composites

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