Table 2 also lists the onset temperatures of the crystallization of
the α fraction of PO. The onset temperatures of the blends containing
2% MP and more were not significantly different from each other but
were significantly higher compared to PO and the blend containing
1% MP. This could be attributed to the substantial amount of previously
formed crystals, consisting of MP and high-melting TAGs of
PO, that was present in the blends with a higher MP concentration
(≥2%). On these previously formed crystals, the low-melting α fraction
could nucleate, which probably occurred faster than direct nucleation
from the melt. In the blend containing 1% MP, the amount of MP
was quite limited as a result of which α nucleation occurred mainly
from the melt