TY - JOUR

T1 - Phase Transitions and Thermodynamic Interaction Parameters of Components in Poly(methyl methacrylate) and Poly(vinyl acetate)

AU - Vshivkov, S. A.

AU - Rusinova, E. V.

PY - 2023/12/1

Y1 - 2023/12/1

N2 - 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.

AB - 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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U2 - 10.1134/S0965545X2360059X

DO - 10.1134/S0965545X2360059X

M3 - Article

VL - 65

SP - 632

EP - 636

JO - Polymer Science - Series A

JF - Polymer Science - Series A

SN - 0965-545X

IS - 6

ER -