Abstract

The process of solid-phase dissolution of polyacrylonitrile copolymer containing ionic sulfo groups in an electron-donating solvent, N-methylmorpholine-N-oxide, is studied depending on its crystal hydrate form and preparation conditions. Optical studies of the transition of solid-phase copolymer–solvent systems to a viscous flow state make it possible to construct solubility curves and reveal stages of morphological transformations during dissolution, explaining their nature. Solid-phase mixed systems are studied by IR spectroscopy, and interactions of the functional groups of the copolymer with various crystal hydrates of the solvent are analyzed both during standard mechanical mixing and mechanochemical activation under intense shear deformation, which predetermines the formation of solid solutions.

中文翻译：

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N-甲基吗啉-N-氧化物中含有甲基磺基的聚丙烯腈共聚物的溶解特性

摘要

N-甲基吗啉-N在给电子溶剂中固相溶解含离子型磺基聚丙烯腈共聚物的过程根据其结晶水合物的形式和制备条件来研究-氧化物。固相共聚物-溶剂体系向粘性流动态过渡的光学研究使得可以构建溶解度曲线并揭示溶解过程中形态转变的阶段，从而解释了它们的性质。通过红外光谱研究固相混合体系，并分析了共聚物的官能团与溶剂的各种晶体水合物之间的相互作用，包括在标准机械混合过程中以及在强烈剪切变形下的机械化学活化过程中，这预先确定了固溶体的形成。