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<p>Sodium poly(4-methacryloylaminosalicylic acid) was synthesized by classical radical polymerization and studied by molecular hydrodynamics methods in dilute salt-free, salt and alkaline solutions in a 20-fold range of MM. The features of macromolecule compaction in solvents of different compositions, in which the sizes of macromolecules change more than 100 times, were considered. Molecular characteristics and the scaling relations [η] = (1.5 ± 0.1)×10<sup>–3</sup>×<i>M</i><sup>0.86±0.01</sup>, <i>s</i><sub>0</sub>= (4.5 ± 0.4)×10<sup>–15</sup>×<i>M</i><sup>0.41±0.02</sup>, <i>D</i><sub>0</sub> = (3.2 ± 0.3)×10<sup>–4</sup>×<i>M</i><sup>–0.59±0.01</sup> were obtained in 0.1&#xa0;M NaCl + 0.1&#xa0;M NaOH. The Kuhn segment of the molecules was estimated using two consimilar and cognate methods – Gray–Bloomfield–Hearst theory and the software Multi-HYDFIT. A comparison with other macromolecular structures of vinyl series was made.</p> Graphical abstract <p></p>

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Hydrodynamic and conformational characteristics of 4-methacryloylaminosalicylic acid sodium salt macromolecules

  • 期刊论文

  • 发表日期：

    2025年11月6日

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  • Olga Dommes,
  • Olga Okatova,
  • Anna Gosteva,
  • Natalya Nesterova,
  • Evgenii Panarin,
  • Georges M. Pavlov

摘要

Sodium poly(4-methacryloylaminosalicylic acid) was synthesized by classical radical polymerization and studied by molecular hydrodynamics methods in dilute salt-free, salt and alkaline solutions in a 20-fold range of MM. The features of macromolecule compaction in solvents of different compositions, in which the sizes of macromolecules change more than 100 times, were considered. Molecular characteristics and the scaling relations [η] = (1.5 ± 0.1)×10–3×M0.86±0.01, s0= (4.5 ± 0.4)×10–15×M0.41±0.02, D0 = (3.2 ± 0.3)×10–4×M–0.59±0.01 were obtained in 0.1 M NaCl + 0.1 M NaOH. The Kuhn segment of the molecules was estimated using two consimilar and cognate methods – Gray–Bloomfield–Hearst theory and the software Multi-HYDFIT. A comparison with other macromolecular structures of vinyl series was made.

Graphical abstract