Secondary Relaxation in glass forming systems

In this work, the beta or secondary relaxation of 15 glass forming systems (13 polymers and 2 low molecular weight liquids) has been analysed by means of Broadband Dielectric Spectroscopy from 10(-2) Hz to 10(7) Hz at tempera tures below and slightly above the glass transition temperature. In further analysis of the experimental results, it has been considered this relaxati on as an thermally activated process with a gaussian distribution of activa tion energies. The results obtained in this way have been compared with rec ent theories that relate this phenomenology with the glass transition one.