ESR investigations on polyethylene-single wall carbon nanotube composites

Mircea Chipara, K. Lozano, Richard Wilkins, E. V. Barrera, M. X. Pulikkathara, Laura Penia-Para, Magdalena Chipara

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14 Citas (Scopus)

Resumen

Electron spin resonance investigations on single wall carbon nanotubes dispersed in polyethylene are reported. Three resonance lines were observed; a wide line assigned to magnetic iron clusters (catalyst residues), a broad and intense line originating from uncoupled electrons delocalized over the conducting domains of carbon nanotubes (in interaction with the electronic spins assigned to magnetic impurities), and a faint line superimposed on the broad one, assigned to paramagnetic impurities. The temperature dependence of resonance line parameters (resonance line position, width, and double integral) in the range 150-450 K has been analyzed. It was observed that the parameters of the broad and narrow lines are sensitive to the glass and melting relaxations occurring within the polymeric matrix.

Idioma originalEnglish
Páginas (desde-hasta)1228-1233
Número de páginas6
PublicaciónJournal of Materials Science
Volumen43
N.º4
DOI
EstadoPublished - 1 feb 2008
Publicado de forma externa

All Science Journal Classification (ASJC) codes

  • Ciencia de los Materiales General
  • Mecánica de materiales
  • Ingeniería mecánica

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