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<p>Polyglycolic acid (PGA) is recognized as a highly promising biodegradable polyester, with its production scale gradually expanding. However, its inherent brittleness and low toughness significantly limit its potential applications. The present study aims to explore the reactive blending of PGA and poly(butylene adipate-<i>co</i>-terephthalate) (PBAT) with a multi-epoxy resin (styrene-methyl methacrylate-glycidoxy methyl methacrylate terpolymer, ADR) as compatibilizer, in order to address these limitations while maintaining degradability. The terminal hydroxyl and carboxyl groups of PBAT and PGA reacted in situ with ADR’s epoxy groups, thereby facilitating the formation of PGA-<i>g</i>-ADR-<i>g</i>-PBAT copolymers. The particle size of PBAT in PGA/PBAT/ADR blend has been reduced from 1.59&#xa0;μm to 0.41&#xa0;μm, indicating an improved compatibility between PGA and PBAT. The PGA/PBAT/ADR blend demonstrated high elongation at break of 185% and a notched impact strength of 15.0 kJ/m<sup>2</sup>, with respective increments of 2500% and 780%. The research has presented a viable pathway for the modification of PGA, highlighting its potential applications in the domains of medical devices and food packaging.</p>

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Superior Toughened Biodegradable Blends of Poly(butylene adipate-co-terephthalate) and Polyglycolic Acid Through Reactive Compatibilization

  • 期刊论文

  • 发表日期：

    2025年9月13日

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  • Hailan Kang,
  • Tao Luo,
  • Yue Xing,
  • Long Li,
  • Feng Yang,
  • Donghan Li,
  • Shikai Hu

摘要

Polyglycolic acid (PGA) is recognized as a highly promising biodegradable polyester, with its production scale gradually expanding. However, its inherent brittleness and low toughness significantly limit its potential applications. The present study aims to explore the reactive blending of PGA and poly(butylene adipate-co-terephthalate) (PBAT) with a multi-epoxy resin (styrene-methyl methacrylate-glycidoxy methyl methacrylate terpolymer, ADR) as compatibilizer, in order to address these limitations while maintaining degradability. The terminal hydroxyl and carboxyl groups of PBAT and PGA reacted in situ with ADR’s epoxy groups, thereby facilitating the formation of PGA-g-ADR-g-PBAT copolymers. The particle size of PBAT in PGA/PBAT/ADR blend has been reduced from 1.59 μm to 0.41 μm, indicating an improved compatibility between PGA and PBAT. The PGA/PBAT/ADR blend demonstrated high elongation at break of 185% and a notched impact strength of 15.0 kJ/m2, with respective increments of 2500% and 780%. The research has presented a viable pathway for the modification of PGA, highlighting its potential applications in the domains of medical devices and food packaging.