| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1884799 | Radiation Physics and Chemistry | 2007 | 5 Pages |
Abstract
The temperature dependence of the free volume holes in pure polytetrafluoroethylene (PTFE) and doped with 25% glass have been studied in the temperature range (30–250 °C) using positron annihilation lifetime spectroscopy. The data clearly revealed the glass transition temperatures for pure and doped PTFE are 130 and 110 °C, respectively. As the temperature increases, the free volume distribution becomes positioned at larger free volume hole size. A good correlation between the electrical conductivity and the o-Ps parameters was achieved.
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Physical Sciences and Engineering
Physics and Astronomy
Radiation
Authors
Hamdy F.M. Mohamed, E.E. Abdel-Hady, Salwa S. Mohamed,