Abstract
The conventional thermal analysis is mostly based upon the thaw-melt method (Rheinboldt method) using capillaries or Kofler's hot stage.
The authors have applied the melt-melt method thermal analysis with the automatic thermoanalyzer developed by them to several two-component systems, including phenacetin-acetanilide, caffeine-theophylline, etc., and the results were compared with the phase diagrams obtained by the conventional methods.
Since this instrument records directly the temperature change of the sample itself by the aid of a thermistor, the melting and eutectic points were readily determined from the temperature-time diagram of melting curves. This gives an advantage in removing ambiguity in visual measurements involving personal errors on melting or wetting point.
