Thermodynamic properties of polymethylsilsesquioxane nanogels with blocking trimethylsilyl groups

Abstract

In this work, the heat capacities of polymethylsilsesquioxane nanogels with blocking trimethylsilyl groups were measured in the range of T = (6–500) K by precise adiabatic calorimetry and differential scanning calorimetry for the first time. In the above temperature interval, the low-temperature anomalies and the glass transition were detected, and the standard thermodynamic characteristics of these physical transformations were determined and analyzed. The standard thermodynamic functions of nanogels were calculated for the range from T → (0 to 500) K based on the obtained experimental results. The standard entropies of formation of nanogels in the devitrified state at T = 298.15 K were determined. The standard thermodynamic properties of the investigated nanogels were discussed.