Electrical properties of composites as affected by the degree of mixedness of the conductive filler in the polymer matrix

Kalyon, Dilhan M.; Birinci, Elvan; Yazici, Rahmi; Karuv, Bahadir; Walsh, Shawn M.

doi:10.1002/pen.11056

Cited by 77 publications

(58 citation statements)

References 27 publications

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“…The lowering of the conductivity by better mixing is attributable to better coating of the conductive material with polymer, hence isolating the particles/droplets from each other and hindering the formation of a percolated network. Similar results have been discussed in the literature (Kalyon et al 2002). …”

Section: Parallel To Extrusion Direction Perpendicular To Extrusion Dsupporting

confidence: 81%

Multilayer co-extrusion technique for developing high energy density organic devices.

Spangler¹,

Schroeder²,

Mrozek

et al. 2009

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The purpose of this project is to develop multi-layered co-extrusion (MLCE) capabilities at Sandia National Laboratories to produce multifunctional polymeric structures. Multi-layered structures containing layers of alternating electrical, mechanical, optical, or structural properties can be applied to a variety of potential applications including energy storage, optics, sensors, mechanical, and barrier applications relevant to the internal and external community. To obtain the desired properties, fillers must be added to the polymer materials that are much smaller than the end layer thickness. We developed two filled polymer systems, one for conductive layers and one for dielectric layers and demonstrated the potential for using MLCE to manufacture capacitors. We also developed numerical models to help determine the material and processing parameters that impact processing and layer stability. 4 ACKNOWLEDGMENTS

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Section: Parallel To Extrusion Direction Perpendicular To Extrusion Dsupporting

confidence: 81%

Multilayer co-extrusion technique for developing high energy density organic devices.

Spangler¹,

Schroeder²,

Mrozek

et al. 2009

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“…Small particles can be added to fill the empty spaces between large particles to increase density [17,18]. The particle size of the powder filler affects the determination of density and maximum aspect ratio of the feedstock [26]. During the blending process, the powder particles are arranged according to shape and size to achieve a stable level because neither the blending process nor excessive pressure can force particles to enter a dense compound [27,28].…”

Section: Resultsmentioning

confidence: 99%

Critical Powder Loading and Rheological Properties of Polypropylene/Graphite Composite Feedstock for Bipolar Plate Application

Iswandi

Sahari

Sulong³

et al. 2016

MJAS

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Bipolar plate is one of the key parts in the fuel cell technology with the advantages of a higher electrical conductivity and mechanical properties are high. Injection molding is one of the manufacturing method that being used in the manufacture of bipolar plates. The critical powder loading and rheological properties of the feedstock are an important factor in the process of injection molding in the manufacturing process of bipolar plate. The critical powder loading feedstocks with a mixture of polypropylene and graphite have been conducted with the torque method test. The appropriate critical powder loading the using a graphite filler material was produced with the composition of 75 % the weight of an optimum load and 25 % weight of polypropylene. The rheological studies have also been carried out using capillary test for determining critical loading powder by increasing the viscosity of the feedstock. The test results showed that the rheological properties of the feedstock with optimum powder loading to exhibit pseudoplastic properties are suitable for injection molding process with the n less than one.Keywords: injection molding, polymer composite, bipolar plate, fuel cell Abstrak Plat dwikutub adalah salah satu bahagian utama pada teknologi sel bahanapi dengan kelebihan sifat kekonduksian elektrik dan mekanik yang tinggi. Pengacuan suntikan adalah salah satu kaedah pembuatan yang digunakan dalam pembuatan plat dwikutub. Pembebanan serbuk genting dan sifat reologi bahan suapan adalah faktor penting dalam proses pengacuan suntikan semasa proses pembuatan plat dwikutub. Pembebanan serbuk genting bahan suapan dengan campuran polipropilina dan grafit telah pun dijalankan dengan kaedah ujian nilai tork. Pembebanan serbuk genting yang sesuai menggunakan bahan suapan grafit telah dihasilkan dengan komposisi 75 % berat yang merupakan beban optimum dan 25 % berat polipropilena. Kajian reologi juga telah dijalankan menggunakan ujian rerambut bagi menentukan beban serbuk genting dengan peningkatan nilai kelikatan bahan suapan. Keputusan ujian sifat reologi didapati bahawa bahan suapan dengan beban serbuk optimal mempamerkan sifat pseudoplastik yang sesuai bagi proses pengacuanan suntikan dengan nilai n kurang daripada 1.Kata kunci: pengacuan suntikan, komposit polimer, plat dwikutub, sel bahanapi ISSN -2506 Iswandi et al: CRITICAL POWDER LOADING AND RHEOLOGICAL PROPERTIES OF POLYPROPYLENE/GRAPHITE COMPOSITE FEEDSTOCK FOR BIPOLAR PLATE APPLICATION 688Introduction Conductive polymer composite (CPC) materials generally comprise a mixture of polymers and conductive fillers, such as carbon-based and metallic fillers. Conductive materials contribute to the improvement of electrical and mechanical properties (e.g., critical load) of a material, particularly for carbon-based materials, such as graphite (G), carbon black (CB), carbon nanotubes, and carbon fiber (CF) [1 -3]. One of the applications of CPC is the bipolar plate, which requires high electrical conductivity for electron mobility. The properties of CPC materi...

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“…Thus, the different mixing rotation (A mr ) that selected to optimize the process parameters of the internal mixing in producing MWCNTs/SG/epoxy nanocomposites were increased from the lowest rotation, at 20, 25 and 30 rpm. Mixing time (B mt ) used to produce MWCNTs/SG/ epoxy nanocomposites are also effective to improve the dispersion of the conductive filler within epoxy resin, so that increased the electrical conductivity of MWCNTs/SG/epoxy nanocomposites produced (Kalyon et al 2002). Therefore, the mixing time (B mt ) selected are 5, 10 and 15 minutes.…”

Section: Selection Of Control Factorsmentioning

confidence: 99%

Optimization of Internal Mixing Parameter on the Electrical Conductivity of Multiwall Carbon Nanotubes/Synthetic Graphite/Epoxy Nanocomposites for Conductive Polymer Composites Using Taguchi Method

Irmayani¹,

Suherman²

2017

JKUKM

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Conductive polymer composites (CPCs Experiment was carried out based on orthogonal array design using these three internal mixing parameter. The results were analyzed using the signal to noise ratio (S/N) and analysis of variance (ANOVA). The percent contribution of each internal mixing parameters to the electrical conductivity of MWCNTs/SG/epoxy resin were mixing rotation (44%), mixing temperature (26%) and mixing time (18%). This was managed to reduce the number of voids and nano size particles conductive filler material (MWCNTs

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Electrical properties of composites as affected by the degree of mixedness of the conductive filler in the polymer matrix

Cited by 77 publications

References 27 publications

Multilayer co-extrusion technique for developing high energy density organic devices.

Multilayer co-extrusion technique for developing high energy density organic devices.

Critical Powder Loading and Rheological Properties of Polypropylene/Graphite Composite Feedstock for Bipolar Plate Application

Optimization of Internal Mixing Parameter on the Electrical Conductivity of Multiwall Carbon Nanotubes/Synthetic Graphite/Epoxy Nanocomposites for Conductive Polymer Composites Using Taguchi Method

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