The effect of hydrostatic pressure on local polymer dynamics in polyisoprene

Benny D. Freeman, Liliane Bokobza, Lucien Monnerie

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Abstract

The effect of hydrostatic pressure on the local molecular motion in bulk polyisoprene (Mw = 1.4 × 106) has been studied by measuring the pressure dependence of the fluorescence lifetime of the intramolecular excimer-forming probe molecule, meso-2,4-di(N-carbazolyl)pentane, dissolved in the polymer. The experiments were performed at 323K and covered a pressure range of 1 to 3000 bar. The results are compared with previous mechanical spectroscopy and excimer-based measurements of polymer dynamics. The range of frequency of polymer motion probed in these experiments was insufficient to discriminate between several empirical models of the pressure dependence of polymer dynamics.

Original languageEnglish
Pages (from-to)1045-1050
Number of pages6
JournalPolymer
Volume31
Issue number6
DOIs
Publication statusPublished - Jun 1990
Externally publishedYes

Keywords

  • dynamics
  • hydrostatic pressure effects
  • molecular motion
  • polyisoprene

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