Furthermore, the impacts of N5 concentration on the density of spherulite
cores were investigated using TEM.
Through an optical microscope of polarized light, the structure of the spherical spherulite
can be displayed and you can still see a pattern of the Maltese cross and concentric light and dark bands, which arise by rotation of the axes "b" and "c" around the axis "a" of unitary cell .
acted as nucleation centers for the calcite crystals, which emerged from the spherulite
nuclei as aggregates of isolated and small calcite crystals and progressively became larger and radially arranged, orienting parallel to each other and perpendicular to the external walls (Figs.
It was noted that surfaces were irregular, and contained a nonhomogeneous distribution of spherulites
and the top and bottom of the samples were not uniform.
Thus, mixed GdCaHM crystal grows as single crystal with square platelet as well as spherulites
of PLLA/NA sample was observed using an XPN-203E (Changfang Optical instrument Co.
c] region, crystallized samples were characterized by a low crystalline degree with a small spherulite
texture containing thin crystals.
The specially molecular structure of l,3:2,4-di(3,4-dimethylbenzylidene) sorbitol (DMDBS) made it able to self-assemble in the iPP melt and form fibrillar network [15-17], that can increase nucleating efficiency and decrease spherulite
In order to show the effect of the addition of PDLA on the isothermal crystallization behavior, the diameter of the PLLA spherulite
against time is plotted in Figure 3.
In this way, the thickness of a spherulite
was calculated from at least five different regions, and the average value was in the range of 5-10 [micro]m.
Unfortunately, the equation predicted spherulite
size distributions, which deviated systematically from the experimentally observed distributions .
During crystal growth, polymer chains orient around the initial nucleation site, or nucleus, in a 3D pattern most often forming a spherical crystal cluster called a spherulite