Estudo da influencia de parametros de processamento na resistencia ao desgaste do polietileno de ultra alto peso molecular
AUTOR(ES)
Marcelo de Carvalho Reis
DATA DE PUBLICAÇÃO
1997
RESUMO
The Ultra High Molecular Weight Polyethylene (UHMWPE) is the most used human artificial joint polymer. In spite of its very good wear resistance properties the lifetime of the prosthetic system is limited by its wear. In order to study how the variation of the processing conditions influences the wear resistance of the plastic, a polymer molding and a wear test devices have been projected and constructed. As a first step, wear tests have been conducted with the variation of the tribological conditions using pins machined from Brazilian commercial sheets. They have been frictioned against 316L stainless steel in water environment. The results of this first step have shown that contact pressure and sliding velocity have very important roles in the polymer wear. As a second step UHMWPE pins have been molded under different pressure conditions and with variation of the mean particle size. These pins have been mctioned under a single tribological condition. The results of these wear tests have shown that the way the pressure is used in the polymer processing may influence its wear resistance
ASSUNTO(S)
polietileno desgaste mecanico plasticos - moldagem
ACESSO AO ARTIGO
http://libdigi.unicamp.br/document/?code=vtls000124632Documentos Relacionados
- Moldagem por compressão a frio do polietileno de ultra alto peso molecular. Parte 1: influência do tamanho, distribuição e morfologia da partícula na densidade a verde
- Investigação do uso de polietileno de ultra alto peso molecular como matriz em compósitos reforçados com fibras de vidro
- Estudo comparativo da resistência ao desgaste e ao impacto de ferros fundidos de alto desempenho
- O uso de implantes orbitários de polietileno granulado de ultra-alto peso molecular no reparo de cavidades anoftálmicas
- ModificaÃÃo das propriedades mecÃnicas do polietileno de ultra-alto peso molecular por implantaÃÃo iÃnica por imersÃo em plasma de nitrogÃnio.