Melting point of crystals

NMR cryoporometry relies on the melting point depression, i.e., the difference in the melting point of crystals with a finite size d, Tm(d), relative to the value of the bulk liquid Tm, which is given by the simplified Gibbs-Thomson equation [16] ... 

Mixture must be stable at temperatures 20°C above melting point of crystallizing component. 

Crystalline melting points of crystallized film samples containing known amounts of plasticizer were determined. 

A more extensive study of crystallization in PEO-PBO diblocks with both ordered (hexagonal, lamellar and gyroid) and disordered melts has been published [38]. The effect on the melting point of crystallization under different conditions and lamellar spacings was investigated using DSC and SAXS, respec-... 

The crystallinity of the small crystal was evaluated from its melting point and the order parameter of the visible absorption in the photostationary state. The melting point of crystal 8 before photo irradiation was 164 ° C, and decreased to 45-5 5 0 C upon irradiation with ultraviolet light. The decrease in the melting point upon ultraviolet irradiation is due to the coexistence of two isomers in the same crystal. The crystal became colorless again on irradiation with visible light. The recovery of the melting... 

Table 1. Melting points of crystals of active and racemic compounds )...

Fig. 7.2 Series of POM images showing determination of the melting point of crystals.

It follows that the melting points of crystals with the chalcopyrite lattice (and the bonding energies in these crystals) decrease appreciably when covalent bonds are distorted because of differences between the sizes of the cations [6,8]. 

Figure 6. Melting point of crystallized PTMO segments vs. molar fraction of oxytetra-methylene (OTM) units, [44]...

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