The glass transition in confined liquids

Publisher Website
Google Scholar
Abstract
Effects of confinement of the 4.0 nm pores of Vycor glass on the alpha relaxation associated with the glass transition were investigated for three glass-forming liquids, glycerol, propylene glycol and propylene carbonate, by dielectric relaxation spectroscopy. The relaxation shifts to lower temperatures in the isochronal (constant-frequency) measurements and to higher frequencies in the isothermal measurements for the confined liquids as compared to the bulk. Confinement induces a broadening of the relaxation and a change of its shape, The results are discussed in relation to the characteristic length of the glass transition (cooperativity length).