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Thermodynamics of carbosilane dendrimers with diundecylsilyl and diundecylsiloxane terminal groups

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Abstract

In this study for the first time the temperature dependences of the heat capacity C 0p 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 0p (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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Acknowledgements

This study was financially supported by the Russian Foundation for Basic Research (project 08-03-00214a).

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Authors and Affiliations

  1. Research Institute of Chemistry, Nizhny Novgorod State University, Prospekt Gagarina, 23/5, 603950, Nizhny Novgorod, Russian Federation

    A. V. Markin, Ya. S. Samosudova & N. N. Smirnova

  2. Enikolopov Institute of Synthetic Polymer Materials, Russian Academy of Sciences, Profsoyuznaya st. 70, 117393, Moscow, Russian Federation

    E. A. Tatarinova, A. V. Bystrova & A. M. Muzafarov

Authors
  1. A. V. Markin
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  2. Ya. S. Samosudova
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  3. N. N. Smirnova
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  4. E. A. Tatarinova
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  5. A. V. Bystrova
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  6. A. M. Muzafarov
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Correspondence to A. V. Markin.

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Markin, A.V., Samosudova, Y.S., Smirnova, N.N. et al. Thermodynamics of carbosilane dendrimers with diundecylsilyl and diundecylsiloxane terminal groups. J Therm Anal Calorim 105, 663–676 (2011). https://doi.org/10.1007/s10973-010-1199-5

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