Relation between Glass Transition and Hydrogen Bond Density in Binary Mixtures of Hydrogen Bonded Liquids

The glass transition temperatures for several hydrogen bonded mixtures have been presented to investigate the correlation between local structure and kinetic properties of supercooled and glassy liquids. The molar hydrogen bond nHB was utillized to estimate the composition dependence of hydrogen bond density in mixtures. The change in local structure in the present systems on mixing was discussed according to the correlation between concentration depencences of the glass transition temperature and nHB. The possibility for the formation of solvation structure caused by interaction analogous to hydrophobic interaction in acqueous solution was suggested for systems including N, N, N', N'-tetramethyl-1,2-propanediamine.