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The Morphology of Carboxylated Composite Latex and Latex Film

Published online by Cambridge University Press:  02 July 2020

O. L. Shaffer ,
M. W. Sandor  and
M. S. El-Aasser
O. L. Shaffer
Affiliation:
Emulsion Polymers Institute, Lehigh University, Bethlehem, PA18015
M. W. Sandor
Affiliation:
Emulsion Polymers Institute, Lehigh University, Bethlehem, PA18015
M. S. El-Aasser
Affiliation:
Emulsion Polymers Institute, Department of Chemical Engineering, Lehigh University, Bethlehem, PA18015
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Extract

Carboxylated latex has become very important in the formation of polymer films. In order to study the film and its properties it is important to know the morphology of the latex that is forming the film. The latex for this study has been examined by transmission electron microscopy(TEM) using positive preferential stains such as ruthenium tetroxide (RuO4) and cesium hydroxide(CsOH); and uranyl acetate(UAc) as a negative stain.

The polybutyl acrylate(PBA)/ polymethylmethacrylate(PMMA) composite latex particles consist of a soft core phase and a hard second phase with varying amounts of acrylic acid in the core, the shell and in both core and shell. The latexes were examined before and after cleaning. The cleaning was necessary in order to remove the surfactant and any small particles that might have formed during the emulsion polymerization. Prior to cleaning, the small particles adhered to the surfaces of the particles making it difficult to determine the final morphology of the latex particles.

Type
Developments in Measuring Polymer Microstructures
Information
Microscopy and Microanalysis , Volume 4 , Issue S2: Proceedings: Microscopy & Microanalysis '98, Microscopy Society of America 56th Annual Meeting, Microbeam Analysis Society 32nd Annual Meeting, Atlanta, Georgia July 12-16, 1998 , July 1998 , pp. 826 - 827
Copyright
Copyright © Microscopy Society of America

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References

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The financial support of BASF AG Ludwigshafen, Germany is greatly appreciated.Google Scholar