Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/195065
Type: Artigo de periódico
Title: Elemental Mapping In Natural Rubber Latex Films By Electron Energy Loss Spectroscopy Associated With Transmission Electron Microscopy.
Author: Rippel, Márcia Maria
Paula Leite, Carlos Alberto
Galembeck, Fernando
Abstract: Element distribution maps from Hevea brasiliensis natural rubber latex thin films were obtained, by electron energy-loss spectroscopic imaging in a low-energy (80 kV) transmission electron microscope. C, N, O, P, Na, Ca, Mg, Al, Si, and S maps are presented for latex fractionated by centrifugation, either followed by dialysis or not. Most elements forming non-carbon compounds are concentrated in small, electron-dense spots surrounded by a carbon-rich matrix of polymer, thus showing that the rubber is filled with small particles compatible with the polyisoprene matrix. Ca distribution is unique, since it closely parallels the C distribution, evidencing an important role for -COO(-)-Ca2+-COO- ionic bridges in the structure of natural rubber.
Subject: Dialysis
Elements
Latex
Membranes, Artificial
Microscopy, Electron
Plants
Spectrometry, Mass, Electrospray Ionization
Rights: fechado
Identifier DOI: 
Address: http://www.ncbi.nlm.nih.gov/pubmed/12069235
Date Issue: 2002
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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