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Novel Experimental Technique for the Determination of Monomer Droplet Size Distribution in Miniemulsion

✍ Scribed by Marcelo do Amaral; Agnès Bogner; Catherine Gauthier; Gilbert Thollet; Pierre-Henri Jouneau; Jean-Yves Cavaillé; José M. Asua

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
162 KB
Volume
26
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Summary: The lack of accurate knowledge for measuring monomer droplet size and droplet size distribution has hampered the further progress of miniemulsion polymerization. Monomer droplet size is probably the most important characteristics of a miniemulsion, influencing the miniemulsion stability and the nucleation mechanism. To date, several experimental techniques have been tested to measure miniemulsion droplet size, but none are convenient and accurate. This work presents a novel experimental technique, using a powerful new scanning transmission electron microscopy (STEM) imaging system, which allows transmission observations of wet samples in an environmental scanning electron microscopy (ESEM). This new imaging technique is a useful technique to directly measure droplet size and droplet size distribution.

Miniemulsion droplets in dark field wet STEM imaging conditions.

magnified imageMiniemulsion droplets in dark field wet STEM imaging conditions.

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