Abstract
The fluorescence lifetime of the intramolecular excimer-forming probe molecule meso-2,4-di(N-carbazolyl) pentane dissolved in cis-polyisoprene and poly(propylene oxide) has been determined as a function of hydrostatic pressure. The rate of the local scale motion of the probe required to form the intramolecular excimer conformation is shown to be controlled by polymer segmental motions connected with the glass-rubber transition phenomenon. The experimental data are compared with the predictions of several free volume-based models of polymer dynamics.
Original language | English |
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Pages (from-to) | 259-264 |
Number of pages | 6 |
Journal | Journal of Luminescence |
Volume | 48-49 |
Issue number | PART 1 |
DOIs | |
Publication status | Published - 1991 |
Externally published | Yes |