Abstract
Effects of confinement on the glass transition of several molecular liquids in porous silica glasses were investigated by differential scanning calorimetry. The glass transition temperature, T g , of liquid isopropylbenzene, glycerol, di-n-butyl phthalate, tret-butylbenzene, and n-butyl acetate confined to sol-gel silica glasses with pore radii in the range 18-152 A was determined. For all liquids the confinement lowers the T g observed, and the Kelvin equation and the Ehrenfest relation were used in a phenomenological way to describe the observed trends of the glass transition with the pore size
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