| Autor: |
Kamalova, D. I., Naumova, S. N., Abdrazakova, L. R. |
| Zdroj: |
Bulletin of the Russian Academy of Sciences: Physics; Aug2018, Vol. 82 Issue 8, p1057-1061, 5p |
| Abstrakt: |
Local molecular dynamics of polymer systems based on polyvinylbutyral is studied via the IR Fourier spectroscopy of conformation-inhomogeneous probes. The compositions of the studied binary mixtures of polyvinylbutyral with polymethylmethacrylate are 80: 20, 60: 40, 40: 60, and 20: 80. The temperatures of the secondary relaxation transitions and the difference between the enthalpies of conformation of the probe molecules in these systems are obtained. The effective sizes of mobile free-volume elements, the diffusion of which results in the transport of small molecules upon membrane gas separation, are estimated. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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