Ultrahigh molecular weight polyethylene (UHMWPE), the current polymer of choice in orthopedic prosthetic devices, is typically sterilized by exposure to Co-60 gamma irradiation prior to packaging for long-term storage. However, the exposure to Co-60 irradiation generates free radicals along the poly
Irradiation of ultrahigh-molecular-weight polyethylene
โ Scribed by Shinde, A. ;Salovey, R.
- Book ID
- 105336098
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1985
- Tongue
- English
- Weight
- 579 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0098-1273
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โฆ Synopsis
Abstract
An ultrahighโmolecularโweight polyethylene material covering a range of crystallinity from 42 to 79% increased in calorimetric crystallinity as a result of chain scission following ionizing irradiation. Carbonyl was formed by a diffusionโlimited reaction of oxygen with longโlived free radicals. Transโvinylene production was linear with radiation dose and was highest for the sample of highest crystallinity but was not sensitive to environment.
๐ SIMILAR VOLUMES
## Abstract The interaction between oxidation and crosslinking in gammaโirradiated ultrahigh molecularโweight polyethylene with and without artificial aging was studied. The effect of the atmosphere during irradiation (air vs. low oxygen) occurred primarily within about 0.5 mm of the surface, that