The new support has been made to catalyst, and the catalyst is
used for propylene polymerization to get PP particles. Optical
microscope images of the support, catalyst, and PP formed are
shown in Figure 3. The particles are in perfectly spherical shape
and none of the particles are agglomerated. The shape of the
PP formed is related to the shape of the catalyst and also the
shape of the support. This is a typical duplication phenomenon
in Ziegler-Natta catalyst and polymerization which is very
important for many kinds of manufacturing techniques.1–3,11–14
Another characteristic of the new support is that the PSD is
very narrow, about 0.70. The benefit of the narrow PSD is that
the screening step is not needed and the uniform support can
be made to catalyst directly. As for spherical support made by
the traditional method mentioned above, because the PSD of
the support is wide, so a screening step is needed to obtain uniform
particles before the catalyst preparation. Particles with too
small or too large diameters must be abandoned before preparing
the catalyst. Catalysts made from small support particles