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<p>Poly(butylene adipate-co-terephthalate) (PBAT) is an excellent candidate for porous material applications; however, its low melt strength presents challenges for producing foamed porous structures through conventional melt processing methods without modification. In this study, PBAT monoliths (PMs) were prepared via a solvent-based thermally induced phase separation (TIPS) method, which enables the formation of highly porous structures with tunable morphology. Furthermore, we noticed that compared with melt processing, the crystallization behavior of PM is unique to phase separation, strongly influencing the mechanical properties of the monoliths. After annealing, the elasticity of the PM significantly increased, and after compression to 70% strain, the plastic deformation decreased from approximately 43–12%. The effects of the annealing time and temperature on the PM performance were then further systematically investigated. This research contributes a template-free method for producing PBAT porous materials with tunable properties, potentially extending their application in fields such as catalysis, filtration, and tissue engineering.</p>

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Fabrication of poly(butylene adipate-co-terephthalate) monoliths by thermally induced phase separation and the effect of the annealing process on mechanical properties

  • 期刊论文

  • 发表日期：

    2025年11月11日

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  • Ruiqi Zhang,
  • Yu-I Hsu,
  • Hiroshi Uyama

摘要

Poly(butylene adipate-co-terephthalate) (PBAT) is an excellent candidate for porous material applications; however, its low melt strength presents challenges for producing foamed porous structures through conventional melt processing methods without modification. In this study, PBAT monoliths (PMs) were prepared via a solvent-based thermally induced phase separation (TIPS) method, which enables the formation of highly porous structures with tunable morphology. Furthermore, we noticed that compared with melt processing, the crystallization behavior of PM is unique to phase separation, strongly influencing the mechanical properties of the monoliths. After annealing, the elasticity of the PM significantly increased, and after compression to 70% strain, the plastic deformation decreased from approximately 43–12%. The effects of the annealing time and temperature on the PM performance were then further systematically investigated. This research contributes a template-free method for producing PBAT porous materials with tunable properties, potentially extending their application in fields such as catalysis, filtration, and tissue engineering.