Abstract
Phase diagrams with UCST are constructed for systems poly(methyl methacrylate)–butanol, poly(vinyl acetate)–methanol, and poly(vinyl acetate)–2-propanol. The boundary curve of the PMMA–о-xylene system is unusual in shape, which is explained by the fact that polymer macromolecules form stereo complexes that appear during solution cooling. The thermodynamic interaction parameters χ of components and the values of χcr and critical concentration of the systems under study are calculated. With increasing temperature the value of χ decreases, which indicates that the interaction of components is improved under heating and agrees with the phase diagrams of the systems.
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ACKNOWLEDGMENTS
We are grateful to M.V. Popova for her participation in this work.
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This work was supported by ongoing institutional funding. No additional grants to carry out or direct this particular research were obtained.
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Vshivkov, S.A., Rusinova, E.V. Phase Transitions and Thermodynamic Interaction Parameters of Components in Poly(methyl methacrylate) and Poly(vinyl acetate). Polym. Sci. Ser. A 65, 632–636 (2023). https://doi.org/10.1134/S0965545X2360059X
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DOI: https://doi.org/10.1134/S0965545X2360059X