Dielectric relaxation measurements on supercooled triphenyl phosphite show that at low temperatures time-temperature superposition (TTS) is accurately obeyed for the primary (alpha) relaxation process. Measurements on 6 other molecular liquids close to the calorimetric glass transition indicate that TTS is linked to an ω−1/2 high-frequency decay of the alpha loss, while the loss peak width is nonuniversal.
@article{arxiv.cond-mat/0006165,
title = {Time-temperature superposition in viscous liquids},
author = {Niels Boye Olsen and Tage Christensen and Jeppe C. Dyre},
journal= {arXiv preprint arXiv:cond-mat/0006165},
year = {2009}
}