Orientation relaxation of fluorescent molecules in uniaxially drawn PVC-films during annealing

Abstract

PVC-films doped with fluorescent molecules of different shapes were uniaxially drawn at 65 and 80°C and subsequently annealed with free and fixed ends. The orientation behaviour of the fluorescent molecules and the polymer segments is investigated by UV-dichroism and fluorescence polarization and by birefringence respectively. The disorientation process of the fluorescent probes is shown to depend on drawing temperature and length of the probes. Longer fluorescent molecules lose their orientation more rapidly and shorter ones more slowly than the polymer segments on an average.

Poster presented during the Spring Conference of the Deutsche Physikalische Gesellschaft, March 18–20, 1985 in Lausannd.