Calorimetric study of 5-trimethylsilyl-2-norbornene, of its polymerization process and of poly(5-trimethylsilyl-2-norbornene) from 5 to 600 K at standard pressure
| Autor: | Natal'ya N. Smirnova, Nina Novosyolova, B. V. Lebedev, Irina Ostrovskaya, Kiryll Makovetskii |
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| Rok vydání: | 1994 |
| Předmět: |
Standard enthalpy of reaction
Polymers and Plastics Bulk polymerization Organic Chemistry Enthalpy Calorimetry Condensed Matter Physics Ring-opening polymerization Ceiling temperature chemistry.chemical_compound Monomer chemistry Polymerization Polymer chemistry Materials Chemistry Physical and Theoretical Chemistry |
| Zdroj: | Macromolecular Chemistry and Physics. 195:1807-1822 |
| ISSN: | 1521-3935 1022-1352 |
| DOI: | 10.1002/macp.1994.021950529 |
| Popis: | Thermodynamic properties of 5-trimethylsilyl-2-norbornene (TMSNB) and poly(5-trimethyl-silyl-2-norbornene) (PTMSNB), viz. the temperature dependence of the isobaric heat capacity Cop of the monomer between 10 and 330 K and of the polymer from 7 to 600 K, were studied by adiabatic vacuum and differential dynamic calorimetry. Temperature and enthalpy of monomer melting as well as parameters of glass transition and glassy state of the monomer and the polymer were determined. From the experimental data, the thermodynamic functions H°(T)-H°(0), S°(T) and G°(T)-H°(0) were calculated for TMSNB in the range of 0 to 330 K and for PTMSNB from 0 to 380 K. In a differential automatic calorimeter, the enthalpy of polymerization of TMSNB to PTMSNB in toluene solution was measured at T = 301 K and p = 101,325 kPa. Under similar physical conditions and in the same calorimeter, enthalpies of dissolution for the monomer and the polymer were estimated. The results were used to calculate the enthalpy, entropy and Gibbs function of bulk polymerization of TMSNB in the range of 0 to 380 K at standard pressure. The ceiling temperature of the polymerization process was also evaluated. |
| Databáze: | OpenAIRE |
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