Some structural and mechanical characteristics of biostable high-molecular-weight polyethylene
| Autor: | G. I. Roitberg, N. P. Tsakulin, A. D. Mishina, A. A. Veretennikova, L. L. Razumova |
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| Rok vydání: | 1982 |
| Předmět: |
Materials science
Polymers and Plastics General Mathematics Prolonged action Polyethylene Condensed Matter Physics Biomaterials chemistry.chemical_compound Crystallinity chemistry Mechanics of Materials Ceramics and Composites Hardening (metallurgy) Graphite carbon Composite material Monoclinic crystal system |
| Zdroj: | Mechanics of Composite Materials. 17:611-615 |
| ISSN: | 1573-8922 0191-5665 |
| DOI: | 10.1007/bf00605265 |
| Popis: | 1. After prolongea (up to 2 years) action of the fluids of living tissue on unloaded pure HMPE and HMPE-GCF no changes in structure were detected when examined by the methods of x-ray diffraction and DTA. 2. Prolonged action of fiexural stressing in physiological solution at 37°C brought about a reduction in the yield pointσyflex. of HMPE by 20–25%; changes in its structure were not detected by the indicated methods. 3. Prolonged action of compressive stressing in physiological solution at 37°C brought about an increase in the yield pointσycomp. of HMPE by ∼40%, i.e., a hardening of the material in respect to this characteristic. At the same time, the degree of crystallinity was increased by several percent, a small structural anisotropy arose and the content of monoclinic phase was slightly increased; all this indicated some structural rearrangement in HMPE during compressive stressing. 4. The high stability of the structure and strength of HMPE in living tissue and under conditions of loading, which imitate physiological action, gives rise to the assumption that unfilled and graphite carbon fiber filled HMPE are suitable for endoprostheses. |
| Databáze: | OpenAIRE |
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