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<p>This study focuses on optimizing free-radical copolymerization in a flow system, emphasizing control over monomer composition—a key factor in industrial applications that require homogeneous products and high conversion. Tubes of varying lengths (2.5&#xa0;m, 5&#xa0;m, 7.5&#xa0;m, 10&#xa0;m) were used to investigate time-dependent variables under random polymerization conditions. Using a method previously shown to achieve precise 50:50 copolymer compositions with styrene and methyl methacrylate, the same was applied in flow conditions. While copolymer composition remained stable, monomer conversion rates varied with tube length and molecular weights were comparable, demonstrating the process’s industrial relevance and tunability.</p> Graphical abstract <p>A free-radical copolymerization process in a flow system controls monomer composition and optimizes conversion. Using tubes of different lengths, a stable 50:50 monomer composition was achieved regardless of polymerization time, though conversion rates and molecular weight varied by tube length. The findings emphasize the industrial significance of flow systems for fine-tuning copolymer properties through specific reaction conditions.</p> <p></p>

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Investigation on regulated copolymer composition in free-radical flow polymerization through tube length variation

  • 期刊论文

  • 发表日期：

    2025年9月5日

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  • Aniruddha Nag,
  • Araki Wakiuchi,
  • Shogo Takasuka,
  • Shigehito Asano,
  • Ryo Hashizume,
  • Miho Hatanaka,
  • Tomoyuki Miyao,
  • Yuya Ohnishi,
  • Takamitsu Matsubara,
  • Tsuyoshi Ando,
  • Tetsunori Sugawara,
  • Mikiya Fujii,
  • Hiroharu Ajiro

摘要

This study focuses on optimizing free-radical copolymerization in a flow system, emphasizing control over monomer composition—a key factor in industrial applications that require homogeneous products and high conversion. Tubes of varying lengths (2.5 m, 5 m, 7.5 m, 10 m) were used to investigate time-dependent variables under random polymerization conditions. Using a method previously shown to achieve precise 50:50 copolymer compositions with styrene and methyl methacrylate, the same was applied in flow conditions. While copolymer composition remained stable, monomer conversion rates varied with tube length and molecular weights were comparable, demonstrating the process’s industrial relevance and tunability.

Graphical abstract

A free-radical copolymerization process in a flow system controls monomer composition and optimizes conversion. Using tubes of different lengths, a stable 50:50 monomer composition was achieved regardless of polymerization time, though conversion rates and molecular weight varied by tube length. The findings emphasize the industrial significance of flow systems for fine-tuning copolymer properties through specific reaction conditions.