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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/16122

Title: Rheological Evaluation of Carbon Nanotube Redistribution in Polymer Melt
Authors: Nishikawa, Riho
Yoon, Howon
Yamaguchi, Masayuki
Keywords: Nanoparticles
Viscoelastic properties
Networks
Composites
Issue Date: 2019-06-14
Publisher: 日本レオロジー学会
Magazine name: 日本レオロジー学会誌 (Journal of the Society of Rheology, Japan)
Volume: 47
Number: 3
Start page: 105
End page: 110
DOI: 10.1678/rheology.47.105
Abstract: We investigated changes to the linear viscoelastic properties of a mixture comprising polycarbonate (PC) containing 3 wt.% of a multiwalled carbon nanotube (MWCNT) and high-density polyethylene (HDPE), also containing 3 wt.% MWCNT, during post-processing annealing. The oscillatory shear moduli — i.e., the storage modulus G′ and the loss modulus G′′ — gradually increased with residence time in a rheometer (i.e., annealing). The samples were prepared by compression-molding at low temperature, during which the MWCNTs became oriented by the applied squeeze flow. The marked increase in the oscillatory moduli may be attributed to the formation of a conductive MWCNT network owing to Brownian motion. Furthermore, the moduli increased more rapidly during high-temperature annealing. These increases can be expressed by a simple equation using only one characteristic time, i.e., the time required for MWCNT redistribution by Brownian motion. This characteristic time is considered one of the factors that control the structure of composites containing MWCNTs.
Rights: 本著作物は日本レオロジー学会の許可のもとに掲載するものです。This material is posted here with permission of the Society of Rheology, Japan. Copyright (C) 2019 日本レオロジー学会. Riho Nishikawa, Howon Yoon, Masayuki Yamaguchi, 日本レオロジー学会誌 (Journal of the Society of Rheology, Japan), 47(3), 2019, 105-110. http://dx.doi.org/10.1678/rheology.47.105
URI: http://hdl.handle.net/10119/16122
Material Type: publisher
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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