Analysis of temperature and aging effects on biomedical ultra-high molecular weight polyethylene's grades using a viscoelastic model

• Tipo: Artigo em Revista Científica Internacional
• Data: 2011

Autores

Rui Miranda Guedes (Autor) FEUP

Revista

Título: Polymer Testing

Vol. 30 Nº 6

Páginas: 641-650

ISSN: 0142-9418

Editora: Elsevier

Indexação

ISI Web of Knowledge - 4 Citações

Scopus - 4 Citações

COMPENDEX

INSPEC

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia dos materiais

Outras Informações

ID Authenticus: P-002-NFS

DOI: 10.1016/j.polymertesting.2011.05.003

Abstract (EN): The applicability of a proposed viscoelastic model, previously developed to model dynamic behaviour of ultra-high molecular weight polyethylenes (UHMWPE), was assessed using three different UHMWPE medical grades. The dynamic data, collected from literature, was obtained via DMTA (Dynamic Mechanical Thermal Analysis) operated over a wide temperature and frequency range. The time-temperature superposition principle (TTSP) was applied to dynamic data via the proposed viscoelastic model. A reference temperature of 37 degrees C was selected. It was verified that both horizontal and vertical shifts are necessary to superimpose the dynamic modulus/frequency curves of all UHMWPE grades. Moreover, it was shown that the aging effect can be modelled using an aging-time superposition principle based on the proposed viscoelastic model. Again, both horizontal and vertical shifts were necessary to superimpose the aged and non-aged dynamic modulus/frequency curves at 37 degrees C.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10