The influence of mechanical damaging on positrons lifetime in ultra-high-molecular polyethylene
The influence of damaging of the ultra-high-molecular polyethylene (PE-UHMW) Chirulen ®1120, which is applied, among others, to produce hip endoprostheses, on spectra of positrons lifetime in this material was investigated. Polyethylene samples were damaged by: impact, rolling friction and collis...
Збережено в:
| Дата: | 2012 |
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| Автори: | , , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Фізико-механічний інститут ім. Г.В. Карпенка НАН України
2012
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| Назва видання: | Фізико-хімічна механіка матеріалів |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/135824 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | The influence of mechanical damaging on positrons lifetime in ultra-high-molecular polyethylene / R. Pietrzak, R. Szatanik, R. Olchawa, K. Książek // Фізико-хімічна механіка матеріалів. — 2012. — Т. 48, № 6. — С. 36-44. — Бібліогр.: 29 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | The influence of damaging of the ultra-high-molecular polyethylene (PE-UHMW) Chirulen
®1120, which is applied, among others, to produce hip endoprostheses, on spectra of
positrons lifetime in this material was investigated. Polyethylene samples were damaged
by: impact, rolling friction and collisions with metal balls in a planetary mill. Changes in
the parameters of positrons lifetime spectra related to annihilation of ortho-positronium
(o-Ps) were analyzed in dependence on the mechanical energy passed to the sample. On
the basis of the Eldrup–Tao model, changes in the radii of voids in which a positronium is
formed and annihilated, as well as changes in the degree of filling up the space atoms in
the examined polymer were determined. |
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