FIELD: chemistry.
SUBSTANCE: invention relates to chemical technology of producing high-molecular compounds based on a solid-state polymer matrix of thermally stable copolymers of polyvinyl alcohol-polystyrene sulphonic acid, which can be used in various industries: electrotechnical: during manufacture of electrode and electrolyte materials for lithium-ion batteries, membranes (separators) for fuel cells; in chemical industry: as a sorbent in membrane methods of separation and purification of liquid mixtures, in the field of medicine: as a binder in the preparation of therapeutic films and medicinal agents. Described is a polyvinyl alcohol-polystyrene sulphonic acid copolymer of structural formula I or II
,
where A1 is CH2 group; A2 is a CH group; A3 is a C-group; L is sulpho (SO3H)-group. Described also is a method of producing a polyvinyl alcohol-polysulphonic acid (PVA-PSA) copolymer, which is carried out in two technological steps: first in the anode compartment of the diaphragm cell at anode current densities of 0.02–0.1 A/cm2, temperature 20–80°C obtaining a sulphonated product of PVA, and then at the second stage by anodic copolymerisation of cross-linking of PVA-PSS through SO2-group at density of anode current of 0.1–0.5 A/cm2, temperature of 100–200°C and vacuum pressure of 10–15 kPa at pH=1–3, a copolymer of structural formula I or pH=6–8 is obtained, a copolymer of structural formula II is obtained.
EFFECT: providing polyvinyl alcohol-polystyrene sulphonic acid copolymers, having bactericidal, film-forming and membrane properties, high ionic conductivity, mechanical strength, flexibility, chemical and thermal stability, wherein the method of producing copolymers enables to eliminate undesirable processes associated with the formation of by-products and reduced multistage activity in the process of separating and purifying the product.
2 cl, 17 dwg, 5 tbl, 13 ex
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