Особливості теплового руху в кристалах, утворених молекулами броміду цетилтриметиламонію
Phase transformations in CTAB polycrystals are investigated with the use of the thermophysical, dielectric, and spectroscopic techniques. A molecular model of these transformations is proposed. According to this model, the free volume in the intercrystalline layer of CTAB polycrystals starts to grow...
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| Datum: | 2025 |
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| Hauptverfasser: | , , , , |
| Format: | Artikel |
| Sprache: | Ukrainian English |
| Veröffentlicht: |
Publishing house "Academperiodika"
2025
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| Schlagworte: | |
| Online Zugang: | https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2022236 |
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| Назва журналу: | Ukrainian Journal of Physics |
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Ukrainian Journal of Physics| Zusammenfassung: | Phase transformations in CTAB polycrystals are investigated with the use of the thermophysical, dielectric, and spectroscopic techniques. A molecular model of these transformations is proposed. According to this model, the free volume in the intercrystalline layer of CTAB polycrystals starts to grow at 10 °С, and Br− ions bound with the –N(CH3)3 terminal groups increase their mobility. At 55 °С, topological solitons of the “one-unit constriction with 180° reorientation” type appear. They arise at terminal methyl groups, pass by the molecules, and are reflected from–N(CH3)3 groups. In this case, CTAB crystals pass to the orthorhombic rotation-crystalline phase. At 92 °С, topological solitons change the orientation of the terminal –N(CH3)3 groups, which results in the melting of nonpolar aliphatic layers. |
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