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<p>The improvement of the toughness of poly (lactic acid) (PLA) has been a highly-discussed topic, which has consequently drawn wide attention among researchers. However, it remains a challenge to enhance the impact toughness of PLA at low cost and high efficiency without sacrificing the biodegradability of the blends. In our study, the biodegradable PLA/poly(butylene adipate-co-terephthalate)/chain extender ADR-4468 (PLA/PBAT/ADR) materials with excellent impact properties were successfully prepared via melt blending combined with post-annealing process. Adding ADR can not only increase the interfacial interaction between PLA and PBAT, but also enhance the impact strength of PLA/PBAT/ADR samples, which rises notably from 9.2 to 22.6&#xa0;kJ/m<sup>2</sup>. Following a facile post-annealing procedure, the impact strength of the annealed sample sharply grows to 69.0&#xa0;kJ/m<sup>2</sup>. These remarkable achievements in performance are mainly due to the growth of PLA crystals around the PBAT phase, which further raises the interfacial strength between the dispersed PBAT and PLA matrix. The knowledge harvested within this study offers an effective and universal approach for fabricating biodegradable PLA-based composites with outstanding impact properties, which will be highly advantageous to the production and application of PLA.</p>

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Fabrication high toughness biodegradable poly(lactic acid)/poly(butylene adipate-co-terephthalate) composites via melt compounding with an epoxy chain extender and facile annealing process

  • 期刊论文

  • 发表日期：

    2025年7月4日

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  • Guidong Tian,
  • Zhiwen Zhu,
  • Benjamin Li,
  • Hezhi He

摘要

The improvement of the toughness of poly (lactic acid) (PLA) has been a highly-discussed topic, which has consequently drawn wide attention among researchers. However, it remains a challenge to enhance the impact toughness of PLA at low cost and high efficiency without sacrificing the biodegradability of the blends. In our study, the biodegradable PLA/poly(butylene adipate-co-terephthalate)/chain extender ADR-4468 (PLA/PBAT/ADR) materials with excellent impact properties were successfully prepared via melt blending combined with post-annealing process. Adding ADR can not only increase the interfacial interaction between PLA and PBAT, but also enhance the impact strength of PLA/PBAT/ADR samples, which rises notably from 9.2 to 22.6 kJ/m2. Following a facile post-annealing procedure, the impact strength of the annealed sample sharply grows to 69.0 kJ/m2. These remarkable achievements in performance are mainly due to the growth of PLA crystals around the PBAT phase, which further raises the interfacial strength between the dispersed PBAT and PLA matrix. The knowledge harvested within this study offers an effective and universal approach for fabricating biodegradable PLA-based composites with outstanding impact properties, which will be highly advantageous to the production and application of PLA.