Studies of the Positron Lifetime and Doppler Broadening Annihilation Radiation of Polyvinyl Chloride Doped with Al2O3
| Autor: | Hamdy F. M. Mohamed, Hossam B. Alaa, Esam E. Abdel‐Hady |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Materials science
Mechanical Engineering Doping Dielectric Conductivity Condensed Matter Physics Molecular physics Condensed Matter::Materials Science Polyvinyl chloride chemistry.chemical_compound Nuclear magnetic resonance Positron chemistry Mechanics of Materials Condensed Matter::Superconductivity Annihilation radiation General Materials Science Doppler broadening Positron annihilation |
| Zdroj: | Materials Science Forum. :328-330 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.445-446.328 |
| Popis: | Positron annihilation lifetime and Doppler broadening of annihilation radiation studies of pure and doped polyvinyl chloride (PVC) with Al2O3 reflect the effect of concentration on free volume. Therefore, variations of the relative fractional free volume, which is extracted from positron annihilation parameters, have been correlated with changes in the dielectric properties (dielectric constant and a.c. conductivity) of the pure and doped PVC with Al2O3 from 10 to 50 %. The o-Ps lifetime and its intensity show a linear dependence with a discontinuity at 30 % concentration of Al2O3. A correlation between the relative fractional free volume and the dielectric parameters has been achieved. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|