| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1884793 | Radiation Physics and Chemistry | 2007 | 4 Pages |
Abstract
The free volume hole and its distribution in polyoxymethylene have been studied over the temperature range (5-90 °C) by positron annihilation lifetime spectroscopy. At a certain temperature (20 °C) the variation of ortho-positronium lifetime shows a distinct increase in its slope. The hole volume shows a small linear increase with temperature below glass transition temperatue and a steeper increase above it. A linear relation between ln(ÏT0.5) and 1/Vh was observed and the critical hole volume was estimated.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Radiation
Authors
E.E. Abdel-Hady, Hamdy F.M. Mohamed, Somia S. Fareed,