Frequency-Dependent Specific Heat and Thermal Conductivity at the Glass Transition in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>o</mml:mi></mml:math>-Terphenyl Mixtures

Abstract

We report frequency-dependent measurements of the specific heat ${c}_{p}$ thermal conductivity $\ensuremath{\kappa}$ of ${(o\ensuremath{-}\mathrm{t}\mathrm{e}\mathrm{r}\mathrm{p}\mathrm{h}\mathrm{e}\mathrm{n}\mathrm{y}\mathrm{l})}_{1\ensuremath{-}x}{(o\ensuremath{-}\mathrm{p}\mathrm{h}\mathrm{e}\mathrm{n}\mathrm{y}\mathrm{l}\mathrm{p}\mathrm{h}\mathrm{e}\mathrm{n}\mathrm{o}\mathrm{l})}_{x}$ mixtures near the glass transition. $\ensuremath{\kappa}$ is flat and frequency independent and all of the dynamics is contained in ${c}_{p}$. The mean relaxation time $\ensuremath{\tau}$ shows non-Arrhenius behavior and the distribution of times broadens with decreasing temperature. The divergence of both $\ensuremath{\tau}$ and the width of the distribution is consistent with the Kauzmann temperature.