Thermal Analysis of a CRF1 Compound C22H28N4O2 via a Temperature Modulated Differential Scanning Calorimetry

Abstract

Using a temperature modulated differential scanning calorimetry (TMDSC), thermal analysis of a new compound C₂₂H₂₈N₄O₂ were studied in the temperature range from T = 198 to 569 K. There existed three stages in the relationship of heat capacity and temperature. The heat capacity steadly increased with temperature increasing in the first stage (198-347 K) and third stage (384-569 K). Their relationship of molar heat capacity and temperature were fitted to the polynomials. Other thermodynamic functions, such as (H_T - H_298.15 K) and (S_T - S_298.15 K) could be calculated by the numerical integral of the heat-capacity polynomial. An endothermic process in the second stage (348-384 K) also was found and the peak in the heat capacity curve was corresponding to fusion process.