Abstract
The molar heat capacity of the first-generation hybrid dendrimer with a “carbosilane core/phenylene shell” structure was measured for the first time in the temperature range T = 6–600 K using a precise adiabatic vacuum calorimeter and DSC. In the above temperature interval, the glass transition of the studied compound was observed, and its thermodynamic characteristics were determined. The standard thermodynamic functions (the enthalpy, the entropy, and the Gibbs energy) of the hybrid dendrimer were calculated over the range from T = 0 to 600 K using the experimentally determined heat capacity. The standard entropy of formation of the investigated dendrimer was evaluated at T = 298.15 K. The obtained thermodynamic properties of the studied hybrid dendrimer were compared and discussed with the literature data for some of the first-generation organosilicon and pyridylphenylene dendrimers.
Highlights
Dendrimers are a unique class of perfect monodisperse macromolecules having a highly branched three-dimensional architecture
We reported the results of a calorimetric study of the first-generation hybrid dendrimer with a “carbosilane core/phenylene shell” structure
The temperature dependence of the heat capacity of the studied compound was determined in the range of T = 6–600 K by precise adiabatic calorimetry and DSC
Summary
Dendrimers are a unique class of perfect monodisperse macromolecules having a highly branched three-dimensional architecture. The thermodynamic properties of the first-generation hybrid dendrimer with a “carbosilane core/phenylene shell” structure have not yet been studied. These are the key data for technological and thermophysical calculations of processes with this dendrimer. As a continuation of publications on thermodynamics of dendrimers, the present study is dedicated to the calorimetric determination of the molar heat capacity of the first-generation hybrid dendrimer with a “carbosilane core/phenylene shell” structure, as well as the calculation of the standard thermodynamic functions (∆H◦, ∆S◦, and ∆G◦) in the range of T = 6–600 K and the estimation of the standard entropy of its formation at T = 298.15 K from the obtained experimental data.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
