{"id":4658,"date":"2026-10-20T20:48:51","date_gmt":"2026-10-20T17:48:51","guid":{"rendered":"https:\/\/polymerjournal.kiev.ua\/?page_id=4658"},"modified":"2026-10-20T20:55:17","modified_gmt":"2026-10-20T17:55:17","slug":"2026-3-1","status":"publish","type":"page","link":"https:\/\/polymerjournal.kiev.ua\/en\/2026-3-1\/","title":{"rendered":"2026 (3) 1"},"content":{"rendered":"

https:\/\/doi.org\/10.15407\/polymerj.48.03.099<\/a><\/p>\n

ION-CONDUCTING MEMBRANES COMPRISING POLY(ETHYLENE OXIDE) AND POLY(ACRYLIC ACID)<\/p>\n

Larysa KUNYTSKA*<\/sup> (<\/strong>ORCID: 0000-0001-7027-0231<\/a>)<\/p>\n

Nataliya PERMYAKOVA (<\/strong>ORCID: 0000-0002-7622-1059<\/a>)<\/p>\n

Stanislav NESIN (<\/strong>ORCID: 0000-0003-2162-3533<\/a>)<\/p>\n

Valerii KLEPKO (<\/strong>ORCID: 0000-0001-8089-8305<\/a>)<\/p>\n

Institute of Macromolecular Chemistry of the NAS of Ukraine, 48 Kharkivske Highway, 02155 Kyiv, Ukraine<\/p>\n

 <\/strong><\/p>\n

*<\/sup>Corresponding author.<\/p>\n

E-mail:  larisa_kunitskaya@ukr.net<\/a><\/p>\n

Polimernyi Zhurnal, 2026, 48<\/strong>, no. 3: 99\u2013107<\/p>\n

Section: Structure and properties<\/p>\n

Language: English.<\/p>\n

Received 03.06.2026<\/p>\n

Accepted 14.09.2026<\/p>\n

Published 19.10.2026<\/p>\n

 <\/strong><\/p>\n

Abstract <\/strong><\/p>\n

Ion-conducting membranes based on di- and triblock copolymers of poly(ethylene oxide) (PEO) and poly(acrylic acid) (PAA), with varying PEO block lengths, were synthesised and their ionic conductivity at room temperature was investigated. The highest conductivity values for the studied membranes were found to range from 4.2\u00b710\u22125<\/sup> \u2013 9.8\u00b710\u22125<\/sup> S\u00b7cm\u22121<\/sup>, depending on the copolymer architecture and environmental conditions. The ionic conductivity of the diblock copolymer membranes was further enhanced by the addition of lithium hexafluorophosphate. Increasing the lithium hexafluorophosphate content from 3 to 9 wt.% was shown to lead to a significant increase in conductivity, from 4.49\u00b710\u22126<\/sup> \u2013 1.98\u00b710\u22125<\/sup> S\u00b7cm\u22121 <\/sup>due to an increase in the concentration of mobile ions, the plasticisation of the polymer matrix and improved dissociation of the copolymer’s carboxyl groups in a saline environment. Additionally, the dielectric properties of the MePEO-b-PAK membrane were examined at different ambient humidity levels (33%, 65%, 81% and 98% relative humidity). It was determined that high humidity levels (81% and 98%) are unsuitable for the practical operation of these membranes as excessive water absorption deteriorates their mechanical and physicochemical properties. Conversely, moderate humidity increases ionic conductivity without significantly compromising the membrane\u2019s integrity. These results highlight the importance of polymer architecture, salt content and environmental control in developing PEO-based polymer electrolytes, and provide useful guidance for designing ion-conducting membranes for use in fuel cells.<\/p>\n

Keywords<\/strong>: Solid polymer electrolytes, block copolymer, dielectric characteristics, ion conductivity, proton exchange membrane<\/p>\n

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      https:\/\/doi.org\/10.15407\/polymerj.48.03.099 ION-CONDUCTING MEMBRANES COMPRISING POLY(ETHYLENE OXIDE) AND POLY(ACRYLIC ACID) Larysa KUNYTSKA* (ORCID: 0000-0001-7027-0231) Nataliya PERMYAKOVA (ORCID: 0000-0002-7622-1059) Stanislav NESIN (ORCID: 0000-0003-2162-3533) Valerii KLEPKO (ORCID: 0000-0001-8089-8305) Institute of Macromolecular Chemistry of the NAS of Ukraine, 48 Kharkivske Highway, 02155 Kyiv, Ukraine   *Corresponding author. E-mail:  larisa_kunitskaya@ukr.net Polimernyi Zhurnal, 2026, 48, no. 3: 99\u2013107 Section: Structure and properties […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/pages\/4658"}],"collection":[{"href":"https:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/comments?post=4658"}],"version-history":[{"count":3,"href":"https:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/pages\/4658\/revisions"}],"predecessor-version":[{"id":4663,"href":"https:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/pages\/4658\/revisions\/4663"}],"wp:attachment":[{"href":"https:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/media?parent=4658"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}