As a first stage in a study of the physicochemical consequences of proton-transfer processes in solutions, the composition regions of a number of protonic acid + hydrazine binary systems in which macroscopic samples can be obtained in the vitreous state have been determined. The glass transition temperatures Tg within these regions have been determined, and are compared with those determined for solutions in the Ca(NO3)2 + CH3NH2 system. Correlations of the magnitude of Tg at a given composition with hydrogen-bonding ability and basicity of the anion are presented. In addition, the glass temperatures of structurally related small-molecule liquids are presented and an interpretation of the relative magnitudes of Tg values in terms of structural and molecular interaction parameters is given. Also presented are the "ideal" glass transition temperatures, T0, for these liquids predicted from thermodynamic data, and the consistency of Tg values with these predicted T0 values is discussed.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry