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<p>To enhance the compatibility of the PBAT/TPS blends, a kind of microcrystalline cellulose-hyperbranched polyester grafting derivative (MCC-HBP) was synthesized to strengthen the interfacial interaction. The results indicated that when the content of MCC-HBP was 0.8 phr, the hydrogen bonding fraction of PBAT/TPS/MCC-HBP blends reached its peak at 0.41, indicating the strongest interaction between PBAT and TPS. Thermal analysis revealed that the addition of MCC-HBP shifted the crystallinity-crystallization time curve of the blend to the right, suggesting that the hydrogen bonding among MCC-HBP, PBAT, and TPS inhibited the movement of polymer chains, thereby suppressing crystal growth in PBAT. Furthermore, at 0.8 phr MCC-HBP content, the PBAT/TPS/MCC-HBP blends exhibited the widest melt processing window and the best thermal stability. The mechanical properties of PBAT/TPS blends were improved most significantly by 0.8 phr of MCC-HBP, with a 27.99% increase in tensile strength, a 23.09% increase in elongation at break, and a 40.51% increase in tensile toughness.</p>

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Synergistic Toughening and Strengthening of PBAT/TPS Blends by Microcrystalline Cellulose-Hyperbranched Polyester Grafting Derivative

  • 期刊论文

  • 发表日期：

    2025年5月15日

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  • Shuyi Zhou,
  • Yujuan Jin,
  • Maolin Guo,
  • Huafeng Tian,
  • Yunxuan Weng

摘要

To enhance the compatibility of the PBAT/TPS blends, a kind of microcrystalline cellulose-hyperbranched polyester grafting derivative (MCC-HBP) was synthesized to strengthen the interfacial interaction. The results indicated that when the content of MCC-HBP was 0.8 phr, the hydrogen bonding fraction of PBAT/TPS/MCC-HBP blends reached its peak at 0.41, indicating the strongest interaction between PBAT and TPS. Thermal analysis revealed that the addition of MCC-HBP shifted the crystallinity-crystallization time curve of the blend to the right, suggesting that the hydrogen bonding among MCC-HBP, PBAT, and TPS inhibited the movement of polymer chains, thereby suppressing crystal growth in PBAT. Furthermore, at 0.8 phr MCC-HBP content, the PBAT/TPS/MCC-HBP blends exhibited the widest melt processing window and the best thermal stability. The mechanical properties of PBAT/TPS blends were improved most significantly by 0.8 phr of MCC-HBP, with a 27.99% increase in tensile strength, a 23.09% increase in elongation at break, and a 40.51% increase in tensile toughness.