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

Authors

  • G. A. Mun Al-Farabi Kazakh National University, 71 Al-Farabi ave., Almaty, Republic of Kazakhstan
  • I. Moldakhan Almaty University of Power Engineering and Telecommunications, 126/1 Baitursynova str., Almaty, Kazakhstan
  • S. B. Kabdushev Almaty University of Power Engineering and Telecommunications, 126/1 Baitursynova str., Almaty, Kazakhstan
  • B. B. Yermukhambetova Al-Farabi Kazakh National University, 71 Al-Farabi ave., Almaty, Republic of Kazakhstan
  • R. Shaikhutdinov Al-Farabi Kazakh National University, 71 Al-Farabi ave., Almaty, Republic of Kazakhstan
  • G. Zh. Yeligbayeva Satbayev University, 22a Satpaev str., Almaty, Kazakhstan

DOI:

https://doi.org/10.18321/ectj960

Keywords:

Thermo-sensitive polymers, Solution turbidity, Phase portrait, Copolymerization, Light scattering intensity

Abstract

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.

References

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Published

2020-06-30

How to Cite

Mun, G. A., Moldakhan, I., Kabdushev, S. B., Yermukhambetova, B. B., Shaikhutdinov, R., & Yeligbayeva, G. Z. (2020). To the Methodology of Phase Transition Temperature Determination in Aqueous Solutions of Thermo-Sensitive Polymers. Eurasian Chemico-Technological Journal, 22(2), 129‒133. https://doi.org/10.18321/ectj960

Issue

Vol. 22 No. 2 (2020)

Section

Articles

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