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Abstract <p>The time required to reach equilibrium in aqueous solutions of thermosensitive linear and star-shaped six-arm block copolymers of poly-2-alkyl-5,6-dihydrooxazines after a jump-like change in temperature was determined using light scattering and turbidimetry. The studied copolymer samples differed in composition and molar mass. It is shown that the equilibrium time has a maximum value near the temperature of the onset of phase separation. At passage from linear to star-shaped block copolymers, the duration of macromolecular aggregation increased strongly. No effect of the composition of the copolymers and their molar mass on the maximum time required to establish constant characteristics of the solution was detected.</p>

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Dependence of the Aggregation Time of Linear and Star-Shaped Block Copolymers of Poly-2-alkyl-5,6-dihydrooxazines in Aqueous Solutions

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • A. P. Filippov,
  • S. V. Rodchenko,
  • T. Yu. Kirila,
  • A. V. Tenkovtsev

摘要

Abstract

The time required to reach equilibrium in aqueous solutions of thermosensitive linear and star-shaped six-arm block copolymers of poly-2-alkyl-5,6-dihydrooxazines after a jump-like change in temperature was determined using light scattering and turbidimetry. The studied copolymer samples differed in composition and molar mass. It is shown that the equilibrium time has a maximum value near the temperature of the onset of phase separation. At passage from linear to star-shaped block copolymers, the duration of macromolecular aggregation increased strongly. No effect of the composition of the copolymers and their molar mass on the maximum time required to establish constant characteristics of the solution was detected.