01481naa a2200169 a 450000100080000000500110000800800410001910000170006024501130007726000090019052008890019965000130108865300150110170000220111670000140113877301590115210285862005-03-28       2003    bl ---       0--  u    #d1 aFERREIRA, M.  aEstudo das propriedades nanomecânicas da borracha natural por espectroscopia de força de alta resolução.  c2003  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.  aBorracha  aPolímeros1 aMATTOSO, L. H. C.1 aORTIZ, C.  tIn: CONGRESSO BRASILEIRO DE POLÍMEROS. 7., nov. 2003., Belo Horizonte, MG. Anais... São Carlos: Associação Brasileira de Polímeros, 2003. p. 232-233.