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Registro Completo
Biblioteca(s): |
Embrapa Instrumentação. |
Data corrente: |
28/03/2005 |
Data da última atualização: |
28/03/2005 |
Autoria: |
FERREIRA, M.; MATTOSO, L. H. C.; ORTIZ, C. |
Título: |
Estudo das propriedades nanomecânicas da borracha natural por espectroscopia de força de alta resolução. |
Ano de publicação: |
2003 |
Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE POLÍMEROS. 7., nov. 2003., Belo Horizonte, MG. Anais... São Carlos: Associação Brasileira de Polímeros, 2003. p. 232-233. |
Idioma: |
Português |
Conteúdo: |
Even though natural rubber may be replaced by its synthetic counterpart, it is not possible to reproduce chemically a polymer network with the same characteristics of the natural polymer. In this context, we have investigated the quality of natural rubber clones and the results show large variations in Mooney viscosity and Wallace plasticity properties
depending on the clone type. The goal of this research was to investigate the molecular origins of these differences behavior using nanoindentation measured by high resolution force spectroscopy (HRFS), which involves measuring the nanoscale elastic contact mechanical force between a probe tip and the elastomer as a function of indentation distance. Results show us the moduli determined by the Oliver Pharr method associated with the spline fits suggested by Vanlandhingan are similar to the values reported in the literature. |
Palavras-Chave: |
Polímeros. |
Thesagro: |
Borracha. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01481naa a2200169 a 4500 001 1028586 005 2005-03-28 008 2003 bl --- 0-- u #d 100 1 $aFERREIRA, M. 245 $aEstudo das propriedades nanomecânicas da borracha natural por espectroscopia de força de alta resolução. 260 $c2003 520 $aEven though natural rubber may be replaced by its synthetic counterpart, it is not possible to reproduce chemically a polymer network with the same characteristics of the natural polymer. In this context, we have investigated the quality of natural rubber clones and the results show large variations in Mooney viscosity and Wallace plasticity properties depending on the clone type. The goal of this research was to investigate the molecular origins of these differences behavior using nanoindentation measured by high resolution force spectroscopy (HRFS), which involves measuring the nanoscale elastic contact mechanical force between a probe tip and the elastomer as a function of indentation distance. Results show us the moduli determined by the Oliver Pharr method associated with the spline fits suggested by Vanlandhingan are similar to the values reported in the literature. 650 $aBorracha 653 $aPolímeros 700 1 $aMATTOSO, L. H. C. 700 1 $aORTIZ, C. 773 $tIn: CONGRESSO BRASILEIRO DE POLÍMEROS. 7., nov. 2003., Belo Horizonte, MG. Anais... São Carlos: Associação Brasileira de Polímeros, 2003. p. 232-233.
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