| Autor: |
L.V. Karabanova, T.D. Ignatova, A.Ye. Nesterov, Yu.S. Lipatov, L.M. Sergeyeva |
| Rok vydání: |
1976 |
| Předmět: |
|
| Zdroj: |
Polymer Science U.S.S.R.. 18:1175-1186 |
| ISSN: |
0032-3950 |
| Popis: |
The methods of inverse gas chromatography and the sorption of the vapours of low molecular substances have been used to investigate a system of interpenetrating polymer networks (IPN), namely, a polyurethane with a styrene-divinyl benzene copolymer. The thermodynamic properties of the IPN were first assessed. The existence of a transition region in the IPN was established experimentally and the proportion of it was assessed, together with the excess enthalpy of mixing as a function of composition. On the basis of the experimental data for the sorption of benzene vapour, the diffusion coefficient in IPN and in the individual components was calculated for various relative pressures of the sorbate vapour. The free volume fraction was calculated for the diffusion process by Fujita's method. It was established that the free volume fractions in IPN were not additive. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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