Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-29T04:10:33.924Z Has data issue: false hasContentIssue false
  • English
  • Français

Structure-Electrical Transport Property Relationship of Anisotropic iPP/CNT Films

Published online by Cambridge University Press:  22 March 2013

Parvathalu Kalakonda ,
Michael Daly ,
Kaikai Xu ,
Yaniel Cabrera ,
Robert Judith ,
Germano S. Iannacchione ,
Georgi Y. Georgiev  and
Peggy Cebe
Parvathalu Kalakonda
Affiliation:
Department of Physics, Worcester Polytechnic Institute, Worcester, MA 01609, USA
Michael Daly
Affiliation:
Department of Natural Sciences - Physics, Assumption College, Worcester, MA 01609, USA
Kaikai Xu
Affiliation:
Department of Natural Sciences - Physics, Assumption College, Worcester, MA 01609, USA
Yaniel Cabrera
Affiliation:
Department of Physics, Tufts University, Medford, MA 02155, USA
Robert Judith
Affiliation:
Department of Physics, Tufts University, Medford, MA 02155, USA
Germano S. Iannacchione
Affiliation:
Department of Physics, Worcester Polytechnic Institute, Worcester, MA 01609, USA
Georgi Y. Georgiev*
Affiliation:
Department of Physics, Worcester Polytechnic Institute, Worcester, MA 01609, USA Department of Natural Sciences - Physics, Assumption College, Worcester, MA 01609, USA
Peggy Cebe
Affiliation:
Department of Physics, Tufts University, Medford, MA 02155, USA
*
*corresponding author: ggeorgie@assumption.edu; georgi@alumni.tufts.edu
Get access

Abstract

The internal micro/nano-structure of anisotropically oriented polymer/CNTs composites determines their macroscopic properties. However, the connections between the two are not fully understood. The varying of CNT concentration, preparation method, and a thermodynamic parameter (e.g. temperature) can all play interconnected role. In this work, the macroscopic electrical conductivity was measured perpendicular to the film thickness of an insulating polymer (isotactic PolyPropylene, iPP) and a nano-composite of iPP with 5 weight percent of CNT. The thin films studied were sheared (anisotropically nano-structured) and non-sheared (with random internal structure). In general the effect of melt shearing induces anisotropy on the electrical transport properties of the iPP/CNT films in directions parallel and perpendicular to the direction of orientation. Our results show that for the pure iPP, resistivity slightly increases with shear at higher temperatures. When CNTs are introduced, there is a large difference between the resistivity of the sheared and non-sheared nanocomposite. The sheared PNCs when the CNTs are aligned parallel to each other, have higher resistivity, which is possibly due to the higher concentration at which the percolation threshold occurs in this arrangement. The resistivity decreases overall, as the temperature increases from 0 to 50 °C. These results show that CNTs can be used to control and fine tune the desired macroscopic physical properties of nanocomposites, by concentration and orientation, such as electrical conductivity, for applications where such properties are necessary.

Keywords

polymerfilmmicrostructure
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1499: Symposium N – Precision Polymer Materials―Fabricating Functional Assemblies, Surfaces, Interfaces and Devices , 2013 , mrsf12-1499-n05-83
Copyright
Copyright © Materials Research Society 2013

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Georgiev, G., McIntyre, M. B., Judith, R., Gombos, E. A., Cebe, P., in Symposium Artificially Induced Crystalline Alignment Thin Films and Nanostructures (Cambridge Journal Online, Cambridge University Press, UK, Materials Research Society Symposium Proceeding, 1308, Warrendale, PA, 2011), DD07–09, DOI:10.1557/opl.2011.157, mrsf10-1308-dd07-09.Google Scholar
Kalakonda, P., Gombos, E. A., Hoonjan, G. S., Georgiev, G.Y., Iannacchione, G. S. and Cebe, P., in Symposium DD Transport Properties in Polymer Nanocomposites II, (Cambridge Journals Online, Cambridge University Press, UK, Materials Research Society Symposium Proceeding, 1410, Warrendale, PA, 2012), Paper# DD1.1; Control ID: 1130053; DOI: 10.1557/opl.2012.817. mrsf11-1410-dd05-06 Google Scholar
Kalakonda, P., Sarkar, S., Gombos, E. A., Georgiev, G.Y., Iannacchione, G.S. and Cebe, P., in Symposium V Multifunctional Polymer-based Materials, (Cambridge Journals Online, Cambridge University Press, UK, Materials Research Society Symposium Proceeding, 1403, Warrendale, PA, 2012), Paper# V12.13; Control ID: 1160868; DOI: 10.1557/opl.2012.371. mrsf11-1403-v12-13.Google Scholar
Gojny, F., Wichmann, M., Fiedler, B., Kinloch, I., Bauhofer, W., Windle, A., Schulte, K., Polymer 47 (6), 2036 (2006)CrossRefGoogle Scholar
Li, L., Jeu, W., Faraday Discuss. 128, 299–319 (2005).CrossRefGoogle Scholar
Georgiev, G., Cabrera, Y., Wielgus, L., Iftikhar, Z., Mattera, M., Gati, P., Potter, A., Cebe, P., in Artificially Induced Grain Alignment in Thin Films, edited by Matias, V., Hammond, R., Moon, S.-H., Hühne, R. (Mater. Res. Soc. Symp. Proc. 1150, Warrendale, PA, 2009), RR04-16, p. 185–190.Google Scholar
Song, W., Kinloch, I.A., Windle, A.H., Science 302, 1363 (2003).CrossRefGoogle Scholar
Dawid, A., Gwizdała, W., Journal of Non-Crystalline Solids 355, 1302–1306 (2009).CrossRefGoogle Scholar
Gwizdała, W., Górny, K., Gburski, Z., Journal of Molecular Structure 887, 148–151 (2008).CrossRefGoogle Scholar
Georgiev, G., Gombos, E. A., McIntyre, M., Mattera, M., Gati, P., Cabrera, Y., Cebe, P., in Nanoscale Pattern Formation, edited by Chason, E., Cuerno, R., Gray, J., Heinig, K.-H., (Mater. Res. Soc. Symp. Proc. 1228E, Warrendale, PA, 2010), KK11–81.Google Scholar
Kim, I., Tannenbaum, A., Tannenbaum, R., Carbon 49(1), 54–61 (2011).CrossRefGoogle ScholarPubMed