By reducing the temperature, going from the liquid down to the crystallization point, this technology may also be applied to test the initiation of crystallization and to monitor its progress.
It should be noted that all these crystals were grown slowly at temperatures just below the THF hydrate crystallization point.
With the increase in T a, the volume of the Fe78B13Si9 ribbons underwent an appreciable change, which first expanded as T a approached the primary crystallization point and then decreased rapidly after crystallization, as clearly observed during the annealing treatment.
Polypropylene, on the other hand, with a much higher undercooling (close to 40 °C), crystallizes at around 80 °C, i.e., now 5 °C below the crystallization temperature of polyethylene.
As was suggested by Mizubayashi et al. [10], electrical current can induce a resonant collective motion of atoms, thereby enhancing atomic migration and facilitating crystallization at temperatures far below the crystallization temperature of the alloy.
We also find uric acid levels below the crystallization threshold in vitro, suggesting that soluble uric acid may be the mediator of the response observed in PBMC.
PHBV also showed the spherulitic morphology within the matrix of the pre-existing PVDF crystals when PVDF/PHBV blends were quenched from the melt to the crystallization temperature below the melting point of PHBV.
When the sample is further cooled below 0 °C, the crystallization of excess water leads to the appearance of sharp ice reflections.
Following Hansen and Baust [59], the samples were cooled and warmed at 1°C/min, and both the crystallization and melting points were recorded.
After a second quench to a temperature below the melting point of PEO, the fractionated crystallization of PEO was observed.
Crystallization of hexagonal phases from the melt, often under metastable conditions and below the triple point, gives a characteristic morphology distinct from direct crystallization of the orthorhombic phase, as found for polyethylene.
