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Specific interactions induced dispersion and confinement of multi-walled carbon nanotubes in co-continuous polymer blends

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Title Specific interactions induced dispersion and confinement of multi-walled carbon nanotubes in co-continuous polymer blends
 
Creator BOSE, S
BHATTACHARYYA, AR
KODGIRE, PV
KULKARNI, AR
MISRA, A
 
Subject electrical-conductivity
mechanical-properties
composites
black
morphology
polycarbonate
polyethylene
spectroscopy
percolation
interface
pa6/abs blends
mwnt
co-continuous morphology
electrical conductivity
 
Description Multiwall carbon nanotubes (MWNT) were melt-mixed with 50/50 co-continuous blends of polyamide 6 (PA6) and acrylonitrile-butadiene-styrene (ABS). Blending sequence and moulding processes were found to have a strong impact on the conductivity of the blends with MWNT Aggregated nature of the tubes, migration during processing and skin-core morphology generated during mould cooling step were found to be crucial parameters affecting the electrical conductivity of the blends. We report here the role of a reactive modifier: sodium salt of 6-amino hexanoic acid (Na-AHA) aiding in uniform dispersion of the MWNT in the 50/50 PA6/ABS blends and restricting the tubes utilizing specific interactions during melt-mixing in the PA6 phase in the blends. We further varied the MWNT to Na-AHA ratio from 1:1 to 1:15 to optimize the concentration of MWNT required in achieving lower electrical percolation threshold in co-continuous PA6/ABS blends. The associated percolation threshold was observed at similar to 0.5 wt% MWNT with high dielectric constant.
 
Publisher AMER SCIENTIFIC PUBLISHERS
 
Date 2011-07-17T04:02:36Z
2011-12-26T12:50:06Z
2011-12-27T05:36:05Z
2011-07-17T04:02:36Z
2011-12-26T12:50:06Z
2011-12-27T05:36:05Z
2008
 
Type Article
 
Identifier JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 8(4), 1867-1879
1533-4880
http://dx.doi.org/10.1166/jnn.2008.015
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4608
http://hdl.handle.net/10054/4608
 
Language en