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Abstract <p>Novel aromatic copoly(amide-imides) have been synthesized using 2-(4-carboxyphenyl)-1,3-dioxoisoindoline-5-carboxylic acid and two diamines, 3,3'-dihydroxy-4,4'-diaminodiphenylmethane and metaphenylenediamine, taken at molar ratios of 7 : 3, 1 : 1, and 3 : 7. The structure, thermal, mechanical, morphological, and transport properties of copoly(amide-imide) nonporous membranes have been studied in comparison with similar copoly(amide-imides) containing carboxyl-containing fragments. It has been shown that films of poly(amide-imides) and copoly(amide-imides) with carboxyl groups –COOH in the diamine fragment exhibit higher permeability compared to similar polymers containing metaphenylenediamine fragments in macrochains and are characterized by more pronounced hydrophilicity. This effect is determined by the occurrence of intra- and intermolecular interactions, with the latter predominating for the copolymers containing carboxyl groups, and their virtual absence in copoly(amide-imides) with metaphenylenediamine fragments, as confirmed by thermal analysis and molecular hydrodynamics.</p>

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Effect of Hydroxyl-Containing Fragments on the Structure and Properties of Copoly(amide-imides) for Membrane Technologies

  • 期刊论文

  • 发表日期：

    2026年4月1日

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  • G. N. Gubanova,
  • G. K. Lebedeva,
  • N. V. Zakharova,
  • M. E. Vylegzhanina,
  • E. V. Kruchinina,
  • E. N. Vlasova,
  • E. N. Popova,
  • V. K. Lavrentiev,
  • K. V. Danilova,
  • S. V. Kononova

摘要

Abstract

Novel aromatic copoly(amide-imides) have been synthesized using 2-(4-carboxyphenyl)-1,3-dioxoisoindoline-5-carboxylic acid and two diamines, 3,3'-dihydroxy-4,4'-diaminodiphenylmethane and metaphenylenediamine, taken at molar ratios of 7 : 3, 1 : 1, and 3 : 7. The structure, thermal, mechanical, morphological, and transport properties of copoly(amide-imide) nonporous membranes have been studied in comparison with similar copoly(amide-imides) containing carboxyl-containing fragments. It has been shown that films of poly(amide-imides) and copoly(amide-imides) with carboxyl groups –COOH in the diamine fragment exhibit higher permeability compared to similar polymers containing metaphenylenediamine fragments in macrochains and are characterized by more pronounced hydrophilicity. This effect is determined by the occurrence of intra- and intermolecular interactions, with the latter predominating for the copolymers containing carboxyl groups, and their virtual absence in copoly(amide-imides) with metaphenylenediamine fragments, as confirmed by thermal analysis and molecular hydrodynamics.