Effects of MWCNT and nickel-coated carbon fiber on the electrical and morphological properties of polypropylene and polyamide 6 blends

Lim, Seung Joon; Lee, Jong Gil; Hur, Soo Hyung; Kim, Woo Nyon

doi:10.1007/s13233-014-2084-z

Cited by 27 publications

(18 citation statements)

References 33 publications

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“…Using the concept of “double percolation” is a new trend and strategy to reduce the percolation threshold concentration. Double percolation is referred to a microstructure in which the filler resides in continuous phase of an immiscible blend or at the interphase of a blend with co‐continuous morphology, resulting to percolation of the filler at lower concentrations than that in one phase polymeric systems . Double‐percolation that was first introduced by Sumita et al .…”

Section: Introductionmentioning

confidence: 99%

“…Relationship between the blend morphology, selective localization of the fillers in the blends and electrical conductivity of the blend composites have been studied in different research works . However, the mechanisms of selective localization of the fillers in immiscible polymer blends are obscure . Researches on polylactide (PLA)/polypropylene (PP)/MWCNT and PC/poly(styrene–acrylonitrile) (SAN)/MWCNT blend nanocomposites showed that the fillers were dominantly localized in the component with higher affinity to the fillers.…”

Section: Introductionmentioning

confidence: 99%

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Conductive poly(vinylidene fluoride)/polyethylene/graphene blend‐nanocomposites: Relationship between rheology, morphology, and electrical conductivity

Rafeie

Aghjeh

Tavakoli

et al. 2018

J of Applied Polymer Sci

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Relationship between rheology, morphology, and electrical conductivity of the poly(vinylidene fluoride)/polyethylene/graphene nano-platelets ternary system (PVDF/PE/GnP) were investigated. All the blend nanocomposites were prepared via a two-step melt mixing method. GnP (0.75 and 1.5 wt %) was first compounded with PVDF and then the resulted premixtuers were melt mixed with PE to achieve the desired compositions. The corresponding reference nanocomposites and filler-less blends were also prepared. Effect of an interfacial agent (PEMA; maleic anhydride grafted polyethylene) was also studied in this work. The results of rheological analysis in conjunction with the Raman spectroscopy experiments revealed that GnP had higher affinity to PVDF than PE, which in turn led to creation of conductive networks of GnP (1.5 wt %) in PVDF matrix exhibiting the electrical conductivity of about 10 22 (S/cm). Double percolated micro-structure was predicted for the PE/PVDF 40/60 (wt/wt) blend containing low GnP content (0.9 wt %) and confirmed via direct electron microscopy and conductivity analysis. Using 5 wt % of the PEMA reduced the conductivity to 10 25 (S/cm) and further increase in PEMA content to 10 wt % led to non-conductive characteristics. The latter was attributed to the migration of GnP from the PVDF phase to PE/PEMA phase and hence disturbance of double percolated micro-structure. V C 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46333.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Conductive poly(vinylidene fluoride)/polyethylene/graphene blend‐nanocomposites: Relationship between rheology, morphology, and electrical conductivity

Rafeie

Aghjeh

Tavakoli

et al. 2018

J of Applied Polymer Sci

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“…Measurements of electrical conductivity were carried out on specimens of the PUF/conductive filler composites (15 mm × 15 mm × 5 mm) (width × length × thickness) according to ASTM D257 with voltage level varied in the range of 0.1–120 V. The composite samples were pressed in the space between two conductive gold‐coated disc electrodes 30 mm in diameter . The pressure was 10 N and measuring time of the sample was about 5 min.…”

Section: Methodsmentioning

confidence: 99%

“…Conductive polymers and their composites are of great research interest because of their wide range of industrial applications and use in household appliances . Electronic devices produce electromagnetic emissions, and the emissions can interfere with the operation of other electronic equipment, causing potential problems.…”

Section: Introductionmentioning

confidence: 99%

Electrical conductivity andEMIshielding effectiveness of polyurethane foam–conductive filler composites

Kim

Lee

Jang

et al. 2016

J of Applied Polymer Sci

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The morphological, electrical, and thermal properties of polyurethane foam (PUF)/single conductive filler composites and PUF/hybrid conductive filler composites were investigated. For the PUF/single conductive filler composites, the PUF/nickel‐coated carbon fiber (NCCF) composite showed higher electrical conductivity and electromagnetic interference shielding effectiveness (EMI SE) than did the PUF/multiwall carbon nanotube (MWCNT) and PUF/graphite composites; therefore, NCCF is the most effective filler among those tested in this study. For the PUF/hybrid conductive fillers PUF/NCCF (3.0 php)/MWCNT (3.0 php) composites, the values of electrical conductivity and EMI SE were determined to be 0.171 S/cm and 24.7 dB (decibel), respectively, which were the highest among the fillers investigated in this study. NCCF and MWCNT were the most effective primary and secondary fillers, and they had a synergistic effect on the electrical conductivity and EMI SE of the PUF/NCCF/MWCNT composites. From the results of thermal conductivity and cell size of the PUF/conductive filler composites, it is suggested that a reduction in cell size lowers the thermal conductivity of the PUF/conductive filler composites. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44373.

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“…Double percolation is referred to a microstructure in which the filler is preferentially localized in continuous phase of an immiscible blend or at the interphase of a blend with co‐continuous morphology. Double percolated systems exhibit lower percolation concentration of the filler compared to single‐phase polymeric systems …”

Section: Introductionmentioning

confidence: 99%

Study on crystalline structure of poly(vinylidene fluoride)/polyethylene/graphene blend‐nanocomposites

et al. 2019

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Effect of graphene nano-platelets (GnP) on the crystalline structure of poly(vinylidene fluoride)/polyethylene (PVDF/PE) blends was studied. The PVDF/GnP were melt compounded with PE and/or PE/PE-g-MA mixture to obtain the desired compositions. Alteration in polymorphism of the PVDF component in the blends and in the presence of GnP, was evaluated employing different analyses. The flow-induced crystallization experiments were conducted under oscillating rheometry at vicinity of crystallization temperature of the PVDF. The results of XRD and FTIR analysis indicated that the charge-transfer C F bonding interaction between the PVDF chains and basal plane of GnP layers led to alteration of polymorphism of PVDF from α form to α-, γ-, and β-phase crystals. Selective localization of the GnP in PVDF component increased the C F bonding interaction and decreased the hydrogen bonding between PVDF and PE chains, respectively. In the presence of PE-g-MA, the hydrogen bonding promoted and the C F bonding interaction decreased leading to predominance of the α-form crystal formation in the PVDF phase. While the GnP acted as nucleating agent in PVDF component under quiescent conditions, it had negative effect on row nuclei under flow conditions. The structures originated from row-nuclei and GnP surfaces, led to formation of "shish-kebab" and "oriented lamella" morphologies, respectively.

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Effects of MWCNT and nickel-coated carbon fiber on the electrical and morphological properties of polypropylene and polyamide 6 blends

Cited by 27 publications

References 33 publications

Conductive poly(vinylidene fluoride)/polyethylene/graphene blend‐nanocomposites: Relationship between rheology, morphology, and electrical conductivity

Conductive poly(vinylidene fluoride)/polyethylene/graphene blend‐nanocomposites: Relationship between rheology, morphology, and electrical conductivity

Electrical conductivity andEMIshielding effectiveness of polyurethane foam–conductive filler composites

Study on crystalline structure of poly(vinylidene fluoride)/polyethylene/graphene blend‐nanocomposites

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