Polycarbonate carbon nanofiber composites

Higgins, Bernadette A.; Brittain, William J.

doi:10.1016/j.eurpolymj.2004.11.040

Cited by 105 publications

(44 citation statements)

References 14 publications

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“…A wide range of thermoplastics, including poly(propylene) (PP), [9] poly (methyl methacrylate), [10,11] polyethylene, [12] polystyrene, [13][14][15][16] and polycarbonate, [17] have been reinforced with inorganic nanofillers and exhibited improved mechanical performance and electrical conductivity. Isotactic PP, one of the most generally used thermoplastics, has nowadays been widely used in the household appliances, food packaging, automotive, and medical devices, due to its high corrosion and heat resistance, excellent formability and high processability, and low cost.…”

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confidence: 99%

“…Although high shear processing appears to be efficient to disperse CNFs, the length and the aspect ratio of the CNFs are often greatly decreased, which results in diminished mechanical properties and conductivity improvements. [17,33,34] In this project, the PP nanocomposites reinforced with various loadings of CNFs were prepared using a facile solvent dispersion strategy. In order to maximize the dispersion of the as-received CNFs, the CNFs were boiled in a PP/xylene solution for 120 min.…”

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confidence: 99%

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Poly(propylene)/Carbon Nanofiber Nanocomposites: Ex Situ Solvent‐Assisted Preparation and Analysis of Electrical and Electronic Properties

Chen

Wei

Yadav

et al. 2011

Macro Materials & Eng

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CNF‐reinforced PP nanocomposites were fabricated from CNFs dispersed in a boiling PP/xylene solution. Their thermal properties were characterized by TGA and DSC and shown to exhibit improved thermal stability and higher crystallinity. They were further processed into thin films by compression molding. The electrical conductivity and dielectric property of the PP/CNF nanocomposite thin films were studied. Both electric conductivity and real permittivity increased with increasing fiber loading. Electrical conductivity percolation is observed between 3.0 and 5.0 wt.‐% fiber loading. The rheological behavior of the nanocomposite melts were also investigated. It was found that a small fiber concentration affects the modulus and viscosity of PP melt significantly. magnified image

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Poly(propylene)/Carbon Nanofiber Nanocomposites: Ex Situ Solvent‐Assisted Preparation and Analysis of Electrical and Electronic Properties

Chen

Wei

Yadav

et al. 2011

Macro Materials & Eng

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“…Additionally, they cost much less than single-walled-CNTs or multi-walled-CNTs and are considered less of a health hazard than CNTs. 17 There have been several articles that describe the rheology of polymer/CNF composites using polycarbonate, [18][19][20][21] polyethylene, 22 polypropylene, 20,[23][24][25][26][27][28][29][30] polyester, 31 polyamide, 23,32 polyimide, 33 poly(methyl methacrylate), 34,35 and polystyrene (PS) 36 as the polymer matrix. Although these articles show the rheological effects of incorporating nanofibers into a polymer matrix, they focus on shear flow and do not investigate the extensional rheology or quantify the effects of fiber orientation.…”

Section: Introductionmentioning

confidence: 99%

Shear and extensional rheology and flow‐induced orientation of carbon nanofiber/polystyrene melt composites

Miyazono

Kagarise

Koelling

et al. 2010

J of Applied Polymer Sci

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ABSTRACT:The rheological behavior and morphology of polystyrene/carbon nanofiber (PS/CNF) composites in their melt phase have been characterized through experimental measurements. Viscosity measurements of the PS/CNF composites in the linear viscoelastic regime show the ratio of the transient extensional viscosity to the transient shear viscosity to be greater than three, the Trouton ratio. This behavior is due to differences in the flow-induced orientation of CNFs in shear and extensional flow. The orientation development of the CNFs in shear and extensional flow was analyzed through a method utilizing transmission electron microscopy and was used to explain observed rheological phenomena.

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“…[14][15] One of the most important challenges in improving the properties of composites based on VGCF is obtaining a uniform dispersion of VGCF within the polymer matrix. 16,17 VGCF-reinforced polymer composites have potential applications as conducting polymeric materials, particularly to promote stiffness and thermal properties, and are classified as a new generation of polymer composites and alternative composite materials for aerospace, automotive and structural applications. Koyama et al 18 have reported that the tensile properties of polypropylene/VGCF composites and monofilaments were improved by melt compounding using a twin screw extruder and fiber spinning operation even if the VGCF content is very small (1 wt% in this study).…”

Section: Introductionmentioning

confidence: 99%

The rheological behavior and thermal conductivity of melt-compounded polycarbonate/vapor-grown carbon fiber composites

Nithikarnjanatharn

Ueda

Tanoue

et al. 2012

Polym J

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The effect of polycarbonate (PC) matrix viscosity on the thermal conductivity of a PC/vapor-grown carbon fiber (VGCF) composite was investigated in this study in terms of the rheological properties of the PC/VGCF using two types of VGCF. Two types of VGCF, which have different aspect ratios (VGCF-h has an aspect ratio of 40, whereas VGCF-s has an aspect ratio of 100), were added to two types of PC with different viscosities. The storage modulus (G¢) and loss modulus (G 00 ) of the PC slightly increased and thermal conductivity gradually increased with the content of VGCF-h. By adding VGCF-s to low-viscosity PC, rheological properties originating in the network structure were observed. Thermal conductivity of low-viscosity PC drastically increased with the content of VGCF-s. By analyzing the length of VGCF in each composite, we found that the length of VGCF decreased with mixing. It was also easy to shorten VGCF in high-viscosity PC. We clarified that the thermal conductivity of PC/VGCF could be controlled with the viscosity of the polymer matrix because the spread of the network structure of VGCF and/or the breaking of VGCF depended on the viscosity of the polymer matrix.

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Polycarbonate carbon nanofiber composites

Cited by 105 publications

References 14 publications

Poly(propylene)/Carbon Nanofiber Nanocomposites: Ex Situ Solvent‐Assisted Preparation and Analysis of Electrical and Electronic Properties

Poly(propylene)/Carbon Nanofiber Nanocomposites: Ex Situ Solvent‐Assisted Preparation and Analysis of Electrical and Electronic Properties

Shear and extensional rheology and flow‐induced orientation of carbon nanofiber/polystyrene melt composites

The rheological behavior and thermal conductivity of melt-compounded polycarbonate/vapor-grown carbon fiber composites

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