title: On the derivation of equilibrium relaxation times from aging experiments.
abstract: Physical aging below the glass transition temperature, Tg, is generally understood to be governed by the same slow degrees of freedom that are responsible for structural relaxation in the equilibrium state above Tg. Provided a reliable model of aging is at hand, it should thus be possible to extract very long relaxation time constants from experimental data on physical aging. Two very different models of aging are investigated in this respect using data for various molecular glass-forming liquids extending out to aging times of 3 × 10(6) s. It turns out that application of the well-known KAHR or TNM model does not provide a significant advantage over a recently proposed phenomenological approach that is much simpler.
authors: Department of Chemistry and Biochemistry, Arizona State University , Tempe, Arizona 85287-1604, United States.
authors: Ranko
authors: R
authors: Richert
authors: Peter
authors: P
authors: Lunkenheimer
authors: Stefan
authors: S
authors: Kastner
authors: Alois
authors: A
authors: Loidl