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<p>Poly (butylene adipate terephthalate) (PBAT) exhibits excellent ductility and biodegradability, however, the inherent drawbacks such as low tensile strength and insufficient rigidity limit its broader applications. In this study, a novel copolyester, poly (butylene adipate-co-phenylsuccinate-co-terephthalate) (PBAPT), was synthesized by incorporating phenylsuccinic acid (PSA) into the PBAT structure <i>via</i> melt polycondensation. The effects of the molar contents of PSA on the properties of the copolyesters was systematically investigated. The structure and composition of PBAPT were analyzed by Fourier Transform Infrared Spectroscopy (FTIR) and Nuclear Magnetic Resonance Hydrogen Spectroscopy (<sup>1</sup>H NMR). Comprehensive evaluations were carried out on the molecular weight, processing characteristics, crystal structure, thermal stability, mechanical properties, barrier performance, and hydrophilicity of PBAPT. The results demonstrated that the PBAPT copolyesters possessed outstanding thermal stability. The introduction of PSA did not alter the crystal structure of PBAT but significantly enhanced both the tensile strength and the elastic modulus of the material, reaching up to 27.5&#xa0;MPa and 170.9&#xa0;MPa, respectively. Furthermore, PBAPT exhibited favorable water vapor barrier properties. The water vapor transmission coefficient was 2.8 × 10⁻¹⁴ g·cm/cm²·s·Pa, representing a reduction of 24.3% compared with PBAT.</p>

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Synthesis and characterization of poly (butylene adipate-co-phenylsuccinate-co-terephthalate) (PBAPT) with good mechanical properties and excellent water vapor barrier

  • 期刊论文

  • 发表日期：

    2026年2月2日

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  • Xiaofeng He,
  • Qunhe Sun,
  • Qi Yue,
  • Xiaofeng Liu,
  • Yang Yu,
  • Tianyu Hao,
  • Tiejun Ge

摘要

Poly (butylene adipate terephthalate) (PBAT) exhibits excellent ductility and biodegradability, however, the inherent drawbacks such as low tensile strength and insufficient rigidity limit its broader applications. In this study, a novel copolyester, poly (butylene adipate-co-phenylsuccinate-co-terephthalate) (PBAPT), was synthesized by incorporating phenylsuccinic acid (PSA) into the PBAT structure via melt polycondensation. The effects of the molar contents of PSA on the properties of the copolyesters was systematically investigated. The structure and composition of PBAPT were analyzed by Fourier Transform Infrared Spectroscopy (FTIR) and Nuclear Magnetic Resonance Hydrogen Spectroscopy (1H NMR). Comprehensive evaluations were carried out on the molecular weight, processing characteristics, crystal structure, thermal stability, mechanical properties, barrier performance, and hydrophilicity of PBAPT. The results demonstrated that the PBAPT copolyesters possessed outstanding thermal stability. The introduction of PSA did not alter the crystal structure of PBAT but significantly enhanced both the tensile strength and the elastic modulus of the material, reaching up to 27.5 MPa and 170.9 MPa, respectively. Furthermore, PBAPT exhibited favorable water vapor barrier properties. The water vapor transmission coefficient was 2.8 × 10⁻¹⁴ g·cm/cm²·s·Pa, representing a reduction of 24.3% compared with PBAT.