Abstract
In this study for the first time the temperature dependences of the heat capacity C p 0 and enthalpies of physical transitions of carbosilane dendrimers with diundecylsilyl and diundecylsiloxane terminal groups of the fifth generation have been measured using the methods of precision adiabatic vacuum calorimetry and differential scanning calorimetry over the range from 6 to 580 K. In the above temperature ranges the physical transformations have been detected and their thermodynamic characteristics were estimated and analyzed. The standard thermodynamic functions: heat capacity C p 0 (T), enthalpy H°(T) − H°(0), entropy S°(T) − S°(0), and free Gibbs energy G°(T) − H°(0) and standard entropies of formation of dendrimers at T = 298.15 K have been calculated over the range from T → 0 K to 580 K. The thermodynamic properties of studied dendrimers have been compared.
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