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<p>Alkali-soluble polyacrylate resins are crucial in UV-curable inks due to their excellent film-forming ability and adhesion. However, their development performance depends heavily on molecular weight and acid value—factors not yet thoroughly studied. To address this, we synthesize polyacrylate resins using methacrylic acid (MAA), methyl methacrylate (MMA), and lauryl methacrylate (LMA), with glycidyl methacrylate (GMA) added for photopolymerization. We then apply an orthogonal experimental design to analyze how acid value (70–90&#xa0;mg KOH/g), chain transfer agent AMSD (1–3%), and initiator dosage (1–3%) affect development. Results show optimal development at an acid value of 70&#xa0;mg KOH/g with 3% AMSD and 3% initiator. Initiator dosage has the strongest effect, followed by AMSD and acid value. GPC analysis confirms that molecular weight is the key factor: overly high values hinder developer penetration, even with sufficient carboxyl groups. Using AMSD reduces polydispersity, improving solubility and development. Essentially, acid value matters only when molecular weights are similar. These insights help optimize resin design for better development performance.</p> Graphical abstract <p></p>

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Influence of molecular weight and acid value on the development performance of UV-curable polyacrylate resins and performance optimization

  • 期刊论文

  • 发表日期：

    2026年7月8日

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  • Pengming He,
  • Linfeng Huang,
  • Ning Qing,
  • Liuyan Tang,
  • Qiquan Luo,
  • Hao Lu,
  • Jiqiang Liu

摘要

Alkali-soluble polyacrylate resins are crucial in UV-curable inks due to their excellent film-forming ability and adhesion. However, their development performance depends heavily on molecular weight and acid value—factors not yet thoroughly studied. To address this, we synthesize polyacrylate resins using methacrylic acid (MAA), methyl methacrylate (MMA), and lauryl methacrylate (LMA), with glycidyl methacrylate (GMA) added for photopolymerization. We then apply an orthogonal experimental design to analyze how acid value (70–90 mg KOH/g), chain transfer agent AMSD (1–3%), and initiator dosage (1–3%) affect development. Results show optimal development at an acid value of 70 mg KOH/g with 3% AMSD and 3% initiator. Initiator dosage has the strongest effect, followed by AMSD and acid value. GPC analysis confirms that molecular weight is the key factor: overly high values hinder developer penetration, even with sufficient carboxyl groups. Using AMSD reduces polydispersity, improving solubility and development. Essentially, acid value matters only when molecular weights are similar. These insights help optimize resin design for better development performance.

Graphical abstract