Abstract
The glass transition phenomena of binary systems consist of polyalcohols such as ethylene glycol, propylene glycol, 1,3-propanediol and glycerol were investigated by differential scanning calorimetry (DSC). For every system, composition dependence of the glass transition temperature, T g( x), was reproducible with an empirical form, T g( x)=[ xT g,1+ C g(1− x) T g,2]/[ x+ C g(1− x)]. The composition dependence of T g predicted based on the entropy theory for regular solutions agreed well with the experimental results in all systems. Excess configurational entropy, S c E, as deviation from the regular solution model, were very small compared to the expected entropy. The behavior of the present system as a regular solution is discussed from the viewpoint of structural change on mixing.
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