Reduction of spherulite
size is long known to be the key to an effective clarification for i-PP [17, 18].
The set of lamellae packaged in parallel is called fibrils, in which the unitary cell of PHB is arranged so that the axis "a" is oriented parallel to the radius of the spherulite
Towards the apex, the calcite crystals in the spherulites
continue growing only until a new spherulite
is formed (Fig.
size reflect the crystallization kinetics of the polymer .
Figure 1(a) is an optical micrograph showing the grown crystal as spherulite
and square platelet.
morphology is observed when samples are melt or solution cast.
POM showed that the spherulite
number of PLLA increased and the spherulite
size significantly reduced in the presence of NA.
In Case 1 the spherulites
are separated and show large droplets on their surface, while in Case 4 coarse spherulite
results including PS droplets.
They added a clarifying agent such as a dibenzylidene sorbitol acetal derivative, reducing spherulite
sizes, which reduces light scattering and maintains clarity.
By using a suitable nucleating agent, the spherulite
size could also be decreased, so that the optical clarity and mechanical properties of the product can be improved [12, 13].
radii were measured with image analysis software (Image pro).
Figure 4b shows the lateral sectioned plane of self-organized 2D crystalline microstructure with inset representing the surface morphology of 2D spherulite