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A new approach to determine rheological percolation of carbon nanotubes in microstructured polymer matrices

Title
A new approach to determine rheological percolation of carbon nanotubes in microstructured polymer matrices
Authors
Mun, SC[Mun, Sung Cik]Kim, M[Kim, Mokwon]Prakashan, K[Prakashan, K.]Jung, HJ[Jung, Hyuk Jin]Son, Y[Son, Younggon]Park, OO[Park, O. Ok]
DGIST Authors
Park, OO[Park, O. Ok]
Issue Date
2014-02
Citation
Carbon, 67, 64-71
Type
Article
Article Type
Article
Keywords
Carbon NanotubesCrossover PointsElectric PropertiesMolecular WeightNew ApproachesPercolation (Computer Storage)Percolation (Fluids)Percolation TheoryPercolation ThresholdsPolymer MatricesPolymersPower Law RelationRadius of GyrationRheological PropertySolvents
ISSN
0008-6223
Abstract
We demonstrate the rheological percolation of carbon nanotubes (CNTs) in microstructured polymer matrices. Polymer/CNT composites are fabricated from polycarbonates with different molecular weights to diversify the microstructures, which vary with the polymer radius of gyration and entanglements. We propose a model for the dispersion of CNTs in polymer matrices, which explains the electrical and rheological properties. The percolation theory represented by a power-law relation cannot account for the rheological percolation of CNTs in this work. Therefore, we investigate the crossover points to provide a quantitative indication of the rheological percolation threshold of nanofillers in polymer matrices. For the first time, the rheological percolation threshold is determined experimentally with this definition. The effects of molecular weight and shear viscosity of the medium on the percolation of CNTs are demonstrated separately. © 2013 Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/2671
DOI
10.1016/j.carbon.2013.09.056
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Files:
There are no files associated with this item.
Collection:
Energy Science and EngineeringETC1. Journal Articles


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