Ionization and adsorption of polyarylenephthalides on a solid substrate and at the sulfuric acid/tetrachloroethane interface
Authors
Kraikin Vladimir Alexandrovich
Ufa Institute of Chemistry, Ufa federal Research Center of RAS
Kuznetsov Sergey Ivanovich
Ufa Institute of Chemistry, Ufa federal Research Center of RAS
Gileva Natalia Georgievna
Ufa Institute of Chemistry, Ufa federal Research Center of RAS
Abstract
The sulfuric acid concentrations at which protonation (ionization) and dissociation of the lactone ring of the phthalide group begin in homopolymers of polydiphenylene oxide phthalide (PDPO) and polyterphenylene phthalide (PTP), as well as the block copolymer PTP125PDPO18, were determined both in thin films cast on a glass substrate and in films formed at the sulfuric acid/tetrachloroethane interface. Spectrophotometric titration of sulfuric acid solutions of these polymers was carried out, and the regions of existence of swollen polymer coils of ionized macromolecules and dense globules, in which the protonated lactone ring forms an unshared ion pair with the hydrosulfate ion, were determined for each of them. Three ranges of H2SO4 concentrations were determined, in which the homopolymers and the corresponding copolymer blocks have different degrees of ionization and different supramolecular structures.
DOI: 10.33184/bulletin-bsu-2026.1.7
Author Biographies
Kraikin Vladimir Alexandrovich, Ufa Institute of Chemistry, Ufa federal Research Center of RAS
doctor of Chemical Sciences, Principal Researcher of the Laboratory of Polymer Chemistry,ORCID ID 0000-0001-8826-8885. Researcher ID A-8818-2017. Scopus Author ID 7003280742
Kuznetsov Sergey Ivanovich, Ufa Institute of Chemistry, Ufa federal Research Center of RAS
leading engineer of the Laboratory of Polymer Chemistry
Gileva Natalia Georgievna, Ufa Institute of Chemistry, Ufa federal Research Center of RAS
Doctor of Chemical Sciences, Senior Researcher of the Laboratory of Polymer Chemistry, ORCID ID 0000-0003-3552-7067. Researcher ID H-1097-2016. Scopus Author ID 6603722709
