To the Methodology of Phase Transition Temperature Determination in Aqueous Solutions of Thermo-Sensitive Polymers
| Autor: | G. A. Mun, I. Moldakhan, S. B. Kabdushev, B. B. Yermukhambetova, R. Shaikhutdinov, G. Zh. Yeligbayeva |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Eurasian Chemico-Technological Journal, Vol 22, Iss 2 (2020) |
| Druh dokumentu: | article |
| ISSN: | 1562-3920 2522-4867 |
| DOI: | 10.18321/ectj960 |
| Popis: | An advanced methodology of phase transition determination in aqueous solutions of thermo-sensitive polymers by using of the phase portraits method has been suggested. The methodology allows highly accurate determining the temperature when exactly a half of molecules loses solubility (from the maximum number that can go to another phase state under given conditions). It is shown that since phase transition passes usually in a wide enough temperature interval this indicator should be used as a quantitative parameter that characterizes phase transition process. Additionally the suggested methodology allows introducing one more quantitative parameter that reflects a sharpness of phase transition. The methodology is verified by an example of phase transitions study in aqueous solutions of thermo-sensitive copolymers based on N-vinylpyrrolidone and vinyl propyl ether. |
| Databáze: | Directory of Open Access Journals |
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