To the Methodology of Phase Transition Temperature Determination in Aqueous Solutions of Thermo-Sensitive Polymers

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 maximu...

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Bibliographic Details
Published in:	Eurasian chemico-technological journal Vol. 22; no. 2; p. 129
Main Authors:	Mun, G.A., Moldakhan, I., Kabdushev, S.B., Yermukhambetova, B.B., Shaikhutdinov, R., Yeligbayeva, G.Zh
Format:	Journal Article
Language:	English
Published:	al-Farabi Kazakh National University 01-01-2020
Subjects:	Copolymerization Light scattering intensity Phase portrait Solution turbidity Thermo-sensitive polymers
Online Access:	Get full text
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Summary:	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.
ISSN:	2522-4867 1562-3920 2522-4867
DOI:	10.18321/ectj960