The Morphology of Carboxylated Composite Latex and Latex Film

Autor:	O. L. Shaffer, M. W. Sandor, M. S. El-Aasser
Rok vydání:	1998
Předmět:	chemistry.chemical_classification Acrylate Materials science Composite number Uranyl acetate Emulsion polymerization Polymer chemistry.chemical_compound chemistry Chemical engineering Transmission electron microscopy Hydroxide Instrumentation Acrylic acid
Zdroj:	Microscopy and Microanalysis. 4:826-827
ISSN:	1435-8115 1431-9276
DOI:	10.1017/s1431927600024259
Popis:	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.
Databáze:	OpenAIRE
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