Thermodynamics of polymerization of vinyltrimethylsilane

Autor:	N. S. Nametkin, B.V. Lebedev, S.G. Durgar'yan, I.B. Rabinovich, Ye.G. Kiparisova, L.Ya. Tsvetkova, V.S. Khotimskii
Rok vydání:	1975
Předmět:	chemistry.chemical_classification chemistry.chemical_compound Monomer chemistry Polymerization Torr Mole General Engineering Physical chemistry Thermodynamics Heat of combustion Polymer Equilibrium constant
Zdroj:	Polymer Science U.S.S.R.. 17:1631-1636
ISSN:	0032-3950
DOI:	10.1016/0032-3950(75)90164-1
Popis:	The thermodynamic parameters of the process vinyltrimethylsilane (VTMS)→→polyvinyltrimethylsilane (PVTMS) have been determined in the temperature region of 50–300°K. It was found that at 300°K ΔH0 = − 47·8 kcal/mole, ΔS0 = − 22·9 kcal/mole/deg and Δ0 = − 10·9 kcal/mole (VTMS-liquid, PVTMS-glassy state). The polymerization-depolymerization equilibrium constant K = 8·8 × 106 at the same temperature. The thermodynamic characteristics of VTMS and PVTMS were determined, namely Cp in the 60–300°K region, p (torr) = f(T) and the enthalpy of combustion of PVTMS (−1038·2±1·8 kcal/mole). HT0H00ST0 and GT0H00 in the region of 0–300°K have been calculated for the monomer and polymer.
Databáze:	OpenAIRE
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