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Mechanical Properties of Polyethylene Containing Defunctionalized Single Wall Carbon Nanotubes

Published online by Cambridge University Press:  01 February 2011

Meisha L. Shofner ,
Haiqing Peng ,
Zhenning Gu ,
Valery N. Khabashesku ,
John L. Margrave  and
Enrique V. Barrera
Meisha L. Shofner
Affiliation:
Department of Mechanical Engineering and Materials Science, Rice University, Houston, TX, 77005, U.S.A
Haiqing Peng
Affiliation:
Department of Chemistry and Center for Nanoscale Science and Technology, Rice University, Houston, TX 77005, U.S.A.
Zhenning Gu
Affiliation:
Department of Chemistry and Center for Nanoscale Science and Technology, Rice University, Houston, TX 77005, U.S.A.
Valery N. Khabashesku
Affiliation:
Department of Chemistry and Center for Nanoscale Science and Technology, Rice University, Houston, TX 77005, U.S.A.
John L. Margrave
Affiliation:
Department of Chemistry and Center for Nanoscale Science and Technology, Rice University, Houston, TX 77005, U.S.A.
Enrique V. Barrera
Affiliation:
Department of Mechanical Engineering and Materials Science, Rice University, Houston, TX, 77005, U.S.A
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Abstract

To take advantage of the benefits of chemical functionalization and the desirable properties of unfunctionalized SWNTs, this research studies the effect of removing functional groups from SWNTs dispersed in a polymer matrix. Chemical functionalization of single wall carbon nanotubes (SWNTs) is a method for disrupting rope structure and adding reactive species to the nanotube to improve interfacial bonding and load transfer in composites, but changes to the nanotube hexagon structure caused by chemical modifications are expected to have a detrimental effect on the SWNTs' intrinsic mechanical properties. Thus, composites containing defunctionalized SWNTs and polyethylene are analyzed to evaluate the effect of functional group removal on the mechanical properties. The mechanical properties are measured using tensile tests. Issues of defects in the SWNT structure, polymer degradation, and changes in the fiber/matrix bonding as a result of functionalization removal are studied using Raman spectroscopy, thermogravimetric analysis, infrared spectroscopy, and dynamic mechanical analysis.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 791: Symposium Q – Mechanical Properties of Nanostructured Materials and Nanocomposites , 2003 , Q10.9
Copyright
Copyright © Materials Research Society 2004

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References

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