ANALYSIS OF POLYMER MOBILITY BY FLUORESCENCE SPECTROSCOPY

Fluorescence spectroscopy using an intramolecular excimer-forming prob e has been used to investigate chain mobility in various polybutadiene s. The spectroscopic technique is completed by a rheological study car ried out in order to identify the molecular parameters governing polym er dynamics. The temperature dependence of the correlation time of the probe motion can be fitted to a WLF equation which shows that the pro be mobility reflects the glass transition phenomenon of the host matri x.