Evaluation and applications of dispersing carbon nanotube in the polymers

Takase, Hirofumi

doi:10.1016/b978-0-444-56336-1.50053-9

Cited by 2 publications

(2 citation statements)

References 13 publications

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“…This could be due, according to the authors, to the breakage of MWCNTs as a consequence of the higher mixing energy input and to the polymer wrapping around the more dispersed nanotubes, isolating the tubes from each other and increasing contact resistance, so interrupting the electrically conducting MWCNT network . Similar results were found for PC/MWCNT systems …”

Section: Introductionsupporting

confidence: 61%

Influence of Processing Parameters During Small‐Scale Batch Melt Mixing on the Dispersion of MWCNTs in a Poly(propylene) Matrix

Mayoral

Lopes

McNally

2013

Macro Materials & Eng

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The relationship between varying processing variables, rotor speed (50 to 200 rpm) and mixing time (10 to 30 min), and MWCNT loading (0.5 to 2.0 wt%), on MWCNT dispersion in a poly(propylene) during batch melt mixing was investigated. MWCNT dispersion was improved by increasing rotor speed and/or mixing time, 200 rpm and 30 min being optimum, although composites prepared employing 100 rpm and 20 min were the most electrically conducting, (<100 S cm−1). PP shear viscosity increased with increasing MWCNT loading yielding a rheological percolation of ∼0.5 wt% MWCNTs. Volume resistivity of the composites decreased with increasing rotor speed and for mixing times up to 20 min only, the former yielding an electrical percolation of ∼0.65 wt% MWCNTs at 200 rpm.

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Section: Introductionsupporting

confidence: 61%

Influence of Processing Parameters During Small‐Scale Batch Melt Mixing on the Dispersion of MWCNTs in a Poly(propylene) Matrix

Mayoral

Lopes

McNally

2013

Macro Materials & Eng

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“…We chose that temperature since the melting temperature of PTT is known to be in the range 226–233 °C. There are a few reports on the effect of mixing methods and mixing conditions on the properties of polymer composites from which we selected the speed and time mentioned above by trial‐and‐error method.…”

Section: Methodsmentioning

confidence: 99%

High‐performance electromagnetic interference shielding material based on an effective mixing protocol

Kunjappan

Poothanari

Ramachandran

et al. 2019

Polymer International

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A facile and economic method is developed for the fabrication of new lightweight materials with high electromagnetic interference (EMI) shielding performance, good mechanical properties and low electrical percolation threshold through melt mixing. Electrical properties, DC conductivity, EMI shielding performance and mechanical properties of poly(trimethylene terephthalate) (PTT)/multiwalled carbon nanotube (MWCNT) nanocomposites with varying filler loading of MWCNTs were investigated. High‐resolution transmission electron microscopy was used to determine the distribution of MWCNTs in the PTT matrix. The newly developed nanocomposites show excellent dielectric and EMI shielding properties. Theoretical electrical percolation threshold was achieved at 0.21 wt% loading of MWCNTs, due to the high aspect ratio and the three‐dimensional network formation of MWCNTs. Experimental DC conductivity values were compared with those of theoretical models such as the Voet, Bueche and Scarisbrick models, which showed good agreement. The PTT/3% MWCNT composite showed an EMI shielding value of ∼38 dB (99.99% attenuation) with a sample thickness of 2 mm. Power balance was used to determine the actual contribution of reflection, absorption and transmission loss to the total EMI shielding value. The nanocomposites showed good tensile and impact properties and the composite with 2% MWCNTs exhibited an improvement in tensile strength of as much as 96%. © 2018 Society of Chemical Industry

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Evaluation and applications of dispersing carbon nanotube in the polymers

Cited by 2 publications

References 13 publications

Influence of Processing Parameters During Small‐Scale Batch Melt Mixing on the Dispersion of MWCNTs in a Poly(propylene) Matrix

Influence of Processing Parameters During Small‐Scale Batch Melt Mixing on the Dispersion of MWCNTs in a Poly(propylene) Matrix

High‐performance electromagnetic interference shielding material based on an effective mixing protocol

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