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Morphology and Film Properties of Composite Carboxylated Latexes

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

In industrial applications, such as paints or adhesives, composite latex particles are very common. Most of the properties which are obtained from composite latexes and their films cannot be achieved by physical blending of different polymer components. Therefore it becomes crucial to examine the morphology of composite latexes formed by a multiple-stage polymerization process. The latexes for this study have been examined by transmission electron microscopy (TEM) and atomic force microscopy (AFM). Various staining methods were used such as ruthenium tetroxide (RuO4), cesium hydroxide (CsOH), and uranyl acetate (UAc) as a negative stain.

The poly(n-butyl acrylate/ poly(methylmethacrylate) (PBA/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 by a centrifugation technique with 100,000 molecular weight filters.

Type
Developments In Scanned Probe Microscopy of Polymers
Information
Microscopy and Microanalysis , Volume 5 , Issue S2: Proceedings: Microscopy & Microanalysis '99, Microscopy Society of America 57th Annual Meeting, Microbeam Analysis Society 33rd Annual Meeting, Portland, Oregon August 1-5, 1999 , August 1999 , pp. 986 - 987
Copyright
Copyright © Microscopy Society of America

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References

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