8, where an increase of growth rate of PLA spherulites
with the content of the noncrystallizable polyfpropylene carbonate) is instead demonstrated.
Charred PPL: dark <650-750 brown/black or ash [degrees]C XPL: spherulites
Discrete PPL: rounded, orange, bone inclusions XPL: dark Spherulites
PPL: not visible XPL: distinctive spherical with extinction cross <5-20[micro]m.
Thus abundant [beta] spherulites
could be found in core region of PP50.
Figure 2 shows the polarized optical micrographs of the spherulites
grown at 140[degrees]C observed in the blends that contained PDLA content, after being quenched from 190[degrees]C.
The micromorphology did highlight further evidence of redeposited animal dung through the presence of dense concentrations of dung spherulites
and some scattered reed phytoliths, in addition to greyish ash with high biofringence, which may indicate melted dung.
When the resin cools, the clarifier crystals form a fine fibrous network that contributes to clarity by providing a very high crystal density with very small spherulites
Obviously, the spherulites
size became smaller with the increase of PLLA/PDLA block length ratio.
Morikawa et al have developed a simple method for manufacturing a porous membrane based on an internal, molecular three-dimensional network structure linked with spherulites
Some PP makers have emulated HCPP's crystalline structure of fine, densely packed spherulites
by means of nucleating agents, whereas HCPP achieves its unusual structure catalytically.
Therefore, the polymer is able to build a larger morphological superstructure such as axial structures or spherulites
which are then observable in polarization light microscopy (PLM) .
Milliken explains that Hyperform HPN-20E works efficiently in PE by "providing a physical molecular-level trigger point around which highly ordered crystalline structures called spherulites
For crystalline materials, this slow cooling causes rigid or nonextensible crystalline sites called spherulites
to form throughout the cross-section of the material, which hampers or sometimes eliminates the possibility of orientation.