Peculiarities of Dissolving Polyacrylonitrile Copolymer Containing Methylsulfo Groups in N-Methylmorpholine-N-Oxideстатья
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Дата последнего поиска статьи во внешних источниках: 3 марта 2021 г.
Аннотация: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.