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Effects of gamma radiation on poly(methyl methacrylate)/single-wall nanotube composites

Published online by Cambridge University Press:  31 January 2011

P. A. O'Rourke Muisener ,
L. Clayton ,
J. D'Angelo ,
J. P. Harmon ,
A. K. Sikder ,
A. Kumar ,
A. M. Cassell  and
M. Meyyappan
P. A. O'Rourke Muisener
Affiliation:
Department of Chemistry, University of South Florida, 4202 E Fowler Avenue, Tampa, Florida 33620–5250
L. Clayton
Affiliation:
Department of Chemistry, University of South Florida, 4202 E Fowler Avenue, Tampa, Florida 33620–5250
J. D'Angelo
Affiliation:
Department of Chemistry, University of South Florida, 4202 E Fowler Avenue, Tampa, Florida 33620–5250
J. P. Harmon
Affiliation:
Department of Chemistry, University of South Florida, 4202 E Fowler Avenue, Tampa, Florida 33620–5250
A. K. Sikder
Affiliation:
Center for Microelectronics Research, University of South Florida, 4202 E Fowler Avenue, Tampa, Florida 33620–5250
A. Kumar
Affiliation:
Center for Microelectronics Research, University of South Florida, 4202 E Fowler Avenue, Tampa, Florida 33620–5250
A. M. Cassell
Affiliation:
NASA Ames Research Center, Moffett Field, California 94035
M. Meyyappan
Affiliation:
NASA Ames Research Center, Moffett Field, California 94035
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Abstract

Single-wall carbon nanotube (SWNT)/poly(methyl methacrylate) (PMMA) composites were fabricated and exposed to ionizing radiation for a total dose of 5.9 Mrads. Neat nanotube paper and pure PMMA were also exposed for comparison, and nonirradiated samples served as controls. A concentration of 0.26 wt% SWNT increased the glass transition temperature (Tg), the Vickers hardness number, and modulus of the matrix. Irradiation of the composite did not significantly change the Tg, the Vickers hardness number, or the modulus; however, the real and imaginary parts of the complex permittivity increased after irradiation. The dielectric properties were found to be more labile to radiation effects than mechanical properties.

Type
Articles
Information
Journal of Materials Research , Volume 17 , Issue 10 , October 2002 , pp. 2507 - 2513
Copyright
Copyright © Materials Research Society 2002

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