聚（甲基丙烯酸甲酯）和聚（醋酸乙烯酯）中各成分的相变和热力学相互作用参数

IF 1 4区化学 Q4 POLYMER SCIENCE

Polymer Science, Series A Pub Date : 2024-02-09 DOI:10.1134/S0965545X2360059X

S. A. Vshivkov, E. V. Rusinova

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引用次数: 0

摘要

摘要利用 UCST 绘制了聚甲基丙烯酸甲酯-丁醇、聚醋酸乙烯酯-甲醇和聚醋酸乙烯酯-2-丙醇体系的相图。聚甲基丙烯酸甲酯-о-二甲苯体系的边界曲线形状异常，其原因是聚合物大分子在溶液冷却过程中形成了立体复合物。计算了所研究体系中各组分的热力学相互作用参数 χ 以及 χcr 值和临界浓度。随着温度的升高，χ 值减小，这表明在加热过程中各组分的相互作用得到了改善，并与各体系的相图相吻合。

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

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

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 χ_cr 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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来源期刊

Polymer Science, Series A 化学-高分子科学

CiteScore

1.70

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Polymer Science, Series A is a journal published in collaboration with the Russian Academy of Sciences. Series A includes experimental and theoretical papers and reviews devoted to physicochemical studies of the structure and properties of polymers (6 issues a year). All journal series present original papers and reviews covering all fundamental aspects of macromolecular science. Contributions should be of marked novelty and interest for a broad readership. Articles may be written in English or Russian regardless of country and nationality of authors. All manuscripts are peer reviewed. Online submission via Internet to the Series A, B, and C is available at http://polymsci.ru.