Calorimetric study of the copolymers on basis perfluorinated germanium hydrides with different structures
| Autor: | Nataliya N. Smirnova, Olga G. Zamyshlyayeva, Yulia A. Zakharova |
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| Rok vydání: | 2012 |
| Předmět: |
Standard molar entropy
Enthalpy chemistry.chemical_element Thermodynamics Germanium Atmospheric temperature range Condensed Matter Physics Heat capacity Gibbs free energy symbols.namesake Differential scanning calorimetry chemistry symbols Physical chemistry Physical and Theoretical Chemistry Adiabatic process |
| Zdroj: | Journal of Thermal Analysis and Calorimetry. 112:1489-1498 |
| ISSN: | 1572-8943 1388-6150 |
| DOI: | 10.1007/s10973-012-2733-4 |
| Popis: | The temperature dependences of heat capacity of copolymers on the basis of perfluorinated germanium hydrides have been measured using an adiabatic vacuum calorimeter over the temperature range from 6 K to the final temperature of their stability for the first time. Thus, the physical transformations were detected and their thermodynamic characteristics were estimated. The experimental results were used to calculate the standard thermodynamic functions, namely heat capacity, enthalpy, entropy and Gibbs function over the range from T → 0 to the final temperature stability of copolymers. The standard entropy of formation of the under study copolymers at T = 298.15 K was calculated. The obtained results were compared with corresponding data for hyperbranching perfluor polyphenylenegermaniums with other structures. Some conclusions about dependences of the thermodynamic polymers properties versus their structures were made. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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