Morphology from melts

The formation of isolated FCSCls was confirmed from the melt of samples with different l (ECSCs-melt-FCSC or FCCs-melt-FCSC). The morphology is the same as the usual one of spherulite or axialite, as reported by Toda [47], irrespective of the morphology before melting. 

It is shown that C does not depend on Z. As C is proportional to AG, AG is a constant irrespective of Z. Therefore, cre is constant irrespective of Z. In the case of ordinary melt crystallization such as FCCs-melt-FCSC, a fold type nucleus is formed. Therefore, it is concluded that the fold type nucleus should be also formed from ECSCs-melt because the cre is constant irrespective of Z, i.e., morphology before melting. 

The factor governing the final size and morphology (from millimetre-sized to large irregular blocks) of HT materials is the melt quenching... 

From the point of view of understanding crystal growth and morphology, the above structure of the NIF means that under any circumstance, whether forming from solution or from melt, the stem length in monodisperse alkane crystals is quantized. 

Under the normal extrusion blending conditions PET/PC blend forms a 2-phase blend morphology. The melt residence times are short enough such that the interchange reaction does not occur, and the PC can be quantitatively extracted out with methylene chloride. From the observed glass transitions of the PET-rich phase and PC-rich phase, measured by DSC or DMA, the blend can be classified as partially miscible with an estimated interaction parameter of slightly positive... 

The optical micrographs taken of sample A recrystallized from melt temperatures of 170, 200, and 230°C show that the morphology varied from row to mixed to spherulitic. The line nucleus seemed to break down into shorter lines and finally to a high concentration of points. 

Iwa] Iwadachi, T., Inoue, A., Minemura, T., Masumoto, T., Nonequilibrium Phases in Fe-X-C (X = Cr, Mo, W) Ternary Alloys Quenched Rapidly from Melts (in Japanese), Nihon-Kinzoku-Gakkai-Shi, 44(3), 245-254 (1980) (Morphology, Phase Relations, Experimental, 30)... 

Neat isotactic polypropylene (iPP) crystallized from melt exhibits spherulitic morphology of the crystalline phase (72,73). In some cases and under very specific conditions, cylindrites, axialites, quadrites, hedrites, and dendrites may be formed of iPP (74). In general, crystallization from quiescent melts results in spherulitic morphology, whereas crystallization fi-om melts subjected to mechanical loads results in cylindrites (75). Crystalline supermolecular structure caused by oriented crystal growth from heterogeneous surfaces is commonly termed transcrystallinity (76). 

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