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Thermodynamic properties of carbosilane dendrimers of the seventh and ninth generations with terminal butyl groups in the temperature range from T → 0 to 600 K

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Abstract

Temperature dependences of the heat capacity of carbosilane dendrimers with butyl terminal groups of the seventh and ninth generations were determined in the temperature range from 6 to 600 K by precision adiabatic vacuum calorimetry and differential scanning (dynamic) calorimetry. The physical transitions were revealed and their thermodynamic characteristics were analyzed. The experimental data obtained were used to calculate the standard thermodynamic functions C p (T), H°(T) − H°(0), S°(T), and G°(T) − H°(0) for the temperature range from T → 0 to 600 K. The thermodynamic function-molar weight isotherms for the dendrimers of the third–ninth generations with terminal butyl groups in the glassy and highly elastic state are linear.

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Authors and Affiliations

  1. Research Institute of Chemistry, N. I. Lobachevsky Nizhnii Novgorod State University, Building 5, 23 prosp. Gagarina, 603950, Nizhnii Novgorod, Russian Federation

    N. N. Smirnova, O. V. Stepanova, T. A. Bykova & A. V. Markin

  2. N. S. Enikolopov Institute of Synthetic Polymer Materials, Russian Academy of Sciences, 70 ul. Profsoyuznaya, 117999, Moscow, Russian Federation

    E. A. Tatarinova & A. M. Muzafarov

Authors
  1. N. N. Smirnova
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  2. O. V. Stepanova
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  3. T. A. Bykova
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  4. A. V. Markin
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  5. E. A. Tatarinova
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  6. A. M. Muzafarov
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Correspondence to N. N. Smirnova.

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Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 1924–1928, October, 2007.

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Smirnova, N.N., Stepanova, O.V., Bykova, T.A. et al. Thermodynamic properties of carbosilane dendrimers of the seventh and ninth generations with terminal butyl groups in the temperature range from T → 0 to 600 K. Russ Chem Bull 56, 1991–1995 (2007). https://doi.org/10.1007/s11172-007-0310-y

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  • DOI: https://doi.org/10.1007/s11172-007-0310-y

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