Broadband dielectric study of the glass transition in poly(ethyleneglycol)-water mixture

S Sudo; M Shimomura; K Kanari; N Shinyashiki; S Yagihara

doi:10.1063/1.2149860

Broadband dielectric study of the glass transition in poly(ethyleneglycol)-water mixture

J Chem Phys. 2006 Jan 28;124(4):044901. doi: 10.1063/1.2149860.

Authors

S Sudo¹, M Shimomura, K Kanari, N Shinyashiki, S Yagihara

Affiliation

¹ Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan.

PMID: 16460206
DOI: 10.1063/1.2149860

Abstract

We performed broadband dielectric measurements of a polyethyleneglycol-water mixture in the frequency range between 10 GHz and 1 microHz and the temperature range between 300 and 133 K. One relaxation process is observed throughout the whole temperature range. The temperature dependence of the relaxation time clearly obeys the Vogel-Fulcher law above 183 K, and the Arrhenius law below 183 K. This observed relaxation process is the secondary process, and the primary process related to the glass transition is masked by the low-frequency ionic contribution below 183 K. The glass transition concerned with the masked primary process leads to the Vogel-Fulcher to Arrhenius transition of the secondary process.