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The influence of melt-mixing process conditions on electrical conductivity of polypropylene/multiwall carbon nanotubes composites

DSpace at IIT Bombay

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Title The influence of melt-mixing process conditions on electrical conductivity of polypropylene/multiwall carbon nanotubes composites
 
Creator TAMBE, PB
BHATTACHARYYA, AR
KULKARNI, AR
 
Subject polypropylene
multiwalled carbon nanotubes
dispersion
melt mixing
ACRYLONITRILE-BUTADIENE-STYRENE
AGGLOMERATE DISPERSION
MECHANICAL-BEHAVIOR
EPOXY COMPOSITES
POLYCARBONATE
RESISTIVITY
BLENDS
MATRIX
NANOCOMPOSITES
MORPHOLOGY
 
Description The influence of melt-mixing parameters on the development of network-like structure of multiwall carbon nanotubes (MWNTs) in injection-molded polypropylene (PP)/MWNTs composites was assessed through AC electrical conductivity measurements. A higher melt-mixing temperature (260 degrees C as compared to 200, 220, and 240 degrees C) at a fixed rotational speed of the screws (150 rpm) and at a fixed mixing time (15 min) has yielded maximum improvement in electrical conductivity in PP/MWNTs composites of 3 wt % MWNTs content. Next to higher melt-mixing temperature, a variation in the melt-mixing time has also led to a variation in electrical conductivity of the composites. Raman spectroscopic analysis revealed an increase in the ratio of intensity due to G-band over that of D-band (IG/ID) of the MWNTs in the skin region as compared to the core region of the injection-molded composites irrespective of the melt-mixing conditions. Microscopic observations could not provide much insight into the variation of MWNTs network-like structure in various PP/MWNTs composites. An attempt has been made to understand the variation of network-like structure of MWNTs in PP/MWNTs composites as a function of melt-mixing parameters through electrical conductivity measurements, Raman spectroscopic analysis, and morphological investigations. (C) 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
 
Publisher WILEY-BLACKWELL
 
Date 2014-10-14T17:12:24Z
2014-10-14T17:12:24Z
2013
 
Type Article
 
Identifier JOURNAL OF APPLIED POLYMER SCIENCE, 127(2)1017-1026
http://dx.doi.org/10.1002/app.37889
http://dspace.library.iitb.ac.in/jspui/handle/100/14537
 
Language en