Effects of carbon nanotubes on polymer physics

Grady, Brian P.

doi:10.1002/polb.23052

Cited by 93 publications

(69 citation statements)

References 259 publications

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“…The transition from an insulating to conducting behavior as a function of filler concentration is known as percolation, and the critical concentration at which this transition occurs is called the percolation threshold. [8][9][10][11] Conductivity, one of the most interesting and investigated properties of NCs 12-15 from an electrical point of view, is also one of the focuses in the present work.…”

Section: Introductionmentioning

confidence: 99%

Investigation of epoxy resin/multiwalled carbon nanotube nanocomposite behavior at low frequency

et al. 2014

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In this work, the electrical characterization of nanocomposites made of epoxy resins with multiwalled carbon nanotubes is presented. As the filler, two different types of multiwalled carbon nanotubes with different aspect ratios (280, 1250) and defectiveness were selected. The production procedure, the morphological characterization, the I-V DC characteristics, and the low frequency complex permittivity (in the range 100 kHz-12 MHz) of these nanocomposites are discussed. To investigate the dispersion of the solution, a study which linked the mixing time to the zeta potential was performed. The experimental results show that with the same matrix and by using the same measurement techniques, the two nanocomposites give different results and can be correlated with the characteristics of nanotubes. The dc conductivity of the nanocomposites was measured by means of a two-point probe technique. The conductivity in the frequency range 100 KHz-12 MHz was evaluated using a circular disk capacitor and measuring the impedance. The measured conductivity follows a percolation scaling law of the form r } (p À p c ) t . A best fit to the measured conductivity data was obtained and the values of the exponent t compared to those in the literature.

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Section: Introductionmentioning

confidence: 99%

Investigation of epoxy resin/multiwalled carbon nanotube nanocomposite behavior at low frequency

et al. 2014

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“…A benefit of this technique is that molecular level interactions between the CNTs and the polymer matrix are obtained, which can lead to a better interface and hence better nanocomposite effective properties. In particular, this technique has been used in the case of thermosets and conducting polymers . Disadvantages of this method include the limited choices of monomer, solvent, and dispersing agents which can be used in this approach.…”

Section: Introductionmentioning

confidence: 99%

Effect of multistage sonication on dispersive mixing of polymer nanocomposites characterized via shear‐induced crystallization behavior

Ganapathi

Kalyon

Fisher

2016

J of Applied Polymer Sci

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While nanoparticle dispersion is necessary to achieve optimal properties, it has long been recognized as a major technological hurdle for polymer nanocomposites. Here, a systematic study incorporated carbon nanotubes (CNTs) in polycaprolactone (PCL) using a multi‐stage sonication process, with Stage 1 sonication of CNT/solvent followed by Stage 2 sonication of the pre‐processed CNT/solvent with the dissolved polymer. Conventional dispersion characterization techniques were complemented with analysis of the shear‐induced crystallization (SIC) behavior of the semicrystalline nanocomposite, which was found to be particularly sensitive to the state of nanoparticle dispersion. While Stage 1 sonication was found to have a pronounced effect on the nanoparticle dispersion as characterized via SIC and thermal characterization, the impact of Stage 2 sonication on the level of nanoparticle dispersion was much smaller. Such results demonstrate the utility of characterization of the shear‐induced crystallization behavior as a means to analyze nanoparticle dispersion in semicrystalline polymer nanocomposites. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44681.

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“…Polymer properties are remarkably improved by the addition of carbon nanotubes (CNTs) when compared with virgin polymers [2] . Since their discovery by Iijima in 1991 [3] , CNTs have been used in many technological applications.…”

Section: Introductionmentioning

confidence: 99%

Comparison among Different Processing Conditions in Synthesis of Polypropylene/Carbon Nanotubes Composites Using Raman Spectroscopy

Pollatos

Chatzigeorgiou

Gjoka

et al. 2014

Polymer-Plastics Technology and Engineering

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This work presents a simple and rapid method for determining which of three combined processing conditions, rotation speed, mixing temperature and duration of mixing that is the most efficient for the preparation of polypropylene/carbon nanotube composites. For this purpose, polypropylene nanocomposites with a constant amount of carbon nanotubes (5.0 wt.%) and different processing conditions are examined through X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Raman Spectroscopy. The latter, Raman Spectroscopy, specializes in and reveals which processing condition among them is the most significant, in order to construct nanocomposites with good dispersion of nanotubes in the polymer matrix.

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Effects of carbon nanotubes on polymer physics

Cited by 93 publications

References 259 publications

Investigation of epoxy resin/multiwalled carbon nanotube nanocomposite behavior at low frequency

Investigation of epoxy resin/multiwalled carbon nanotube nanocomposite behavior at low frequency

Effect of multistage sonication on dispersive mixing of polymer nanocomposites characterized via shear‐induced crystallization behavior

Comparison among Different Processing Conditions in Synthesis of Polypropylene/Carbon Nanotubes Composites Using Raman Spectroscopy

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