2004 Volume 53 Issue 12 Pages 627-640
Fine metallic soap particles synthesized by jet mixing process have a much narrower particle size distribution and more homogeneous surface structure than metallic soap particles prepared by the method of pulverizing and classifying. With jet mixing, reaction conditions can be adjusted so as to control particle sizes while maintaining the above characteristics unchanged. With these particles it is possible to examine in detail the relationship between the particle size and condition and the crystalline condition and other physical properties, which has been considered impossible to perform using metallic soaps prepared by the conventional method of pulverizing and classifying. So, using fine particles of fatty acid zinc salt as a model of metallic soap for structure analysis, the influence of average particle size and fatty acid composition were examined on crystallinity, heat characteristics and other properties of the particles. Diffraction intensities, half-band widths, and long spacings of Miller index (003) peaks were analyzed from X-Ray Diffraction chart and compared with average particle size and fatty acid composition for fine particles of fatty acid zinc salt. Furthermore, Crystallinity of fine particles of fatty acid zinc salt were examined by these results, and were compared with results of differential scanning calorimetry and specific surface area analysis. The results are described in the present report.
