Ultrafast dynamics of polybutadiene probed by optically heterodyne-detected optical-Kerr-effect spectroscopy

N T Hunt, S R Meech

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Abstract

The ultrafast dynamics of polybutadiene have been studied using ultrafast optical-Kerr-effect spectroscopy. The data are compared with measurements on 1,3- and 1,4-pentadiene. The two diene derivatives have quite distinct subpicosecond dynamics, with an important contribution from an intramolecular torsional mode in the 1,4-derivative. The main part of the polymer spectral density can be assigned, by analogy with the data for 1,4-pentadiene, to intramolecular torsional motion about carbon-carbon single bonds. The picosecond diffusive orientational relaxation times of the dienes are not well described by simple hydrodynamics.

Original languageEnglish
Pages (from-to)368-373
Number of pages6
JournalChemical Physics Letters
Volume400
Issue number4-6
DOIs
Publication statusPublished - 21 Dec 2004

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Keywords

  • intermolecular dynamics
  • raman spectroscopy
  • isotropic phase
  • liquid crystals
  • glasses
  • microemulsions
  • modes

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