中国塑料 ›› 2025, Vol. 39 ›› Issue (5): 36-42.DOI: 10.19491/j.issn.1001-9278.2025.05.006

• 材料与性能 • 上一篇    下一篇

端环氧型超支化聚酯对聚乳酸/滑石粉复合材料性能的影响研究

冯硕, 周舒毅, 焦洋, 胡淼, 张若轩, 靳玉娟()   

  1. 北京工商大学轻工科学与工程学院,北京 100048
  • 收稿日期:2024-09-04 出版日期:2025-05-26 发布日期:2025-05-22
  • 通讯作者: 靳玉娟(1983—),女,教授,从事生物基与降解高分子材料的改性研究,jinyujuan@th.btbu.edu.cn
    E-mail:jinyujuan@th.btbu.edu.cn
  • 基金资助:
    大学生科研与创业行动计划和实培计划(S202410011020);北京高校大学生创新创业训练校际合作计划项目(202498022)

Effect of epoxy⁃terminated hyperbranched polyester on properties of poly(lactic acid)/talc blends

FENG Shuo, ZHOU Shuyi, JIAO Yang, HU Miao, ZHANG Ruoxuan, JIN Yujuan()   

  1. College of Light Industry Science and Engineering,Beijing Technology and Business University,Beijing 100048,China
  • Received:2024-09-04 Online:2025-05-26 Published:2025-05-22
  • Contact: JIN Yujuan E-mail:jinyujuan@th.btbu.edu.cn

摘要:

合成了端环氧基超支化聚酯(EHBP),将其与聚乳酸(PLA)/滑石粉熔融共混制得PLA/滑石粉/EHBP复合材料,并通过接触角测量仪、红外光谱仪(FTIR)、万能试验机、差示扫描量热仪(DSC)、热失重分析仪(TG)和扫描电子显微镜(SEM)等对其表面疏水性能、分子结构、力学性能、结晶性能、热性能及微观形貌等进行了表征。结果表明EHBP的加入使PLA/滑石粉复合材料结晶度降低;EHBP添加量为2份时PLA和滑石粉相容性最好;添加EHBP对PLA/滑石粉复合材料起到增强增韧作用。相对于PLA/滑石粉复合材料,当EHBP添加量为2份 时,PLA/滑石粉/EHBP复合材料的力学性能提升最大,断裂伸长率提升了29.3 %,冲击性能提升了49.8 %,拉伸强度提升了31.3 %。

关键词: 聚乳酸, 滑石粉, 端环氧型超支化聚酯, 相容性

Abstract:

In this paper, epoxy⁃terminated hyperbranched polyester (EHBP) were synthesized and then blended with poly(lactic acid) (PLA) and talc powders through melt blending to obtain PLA/talc/EHBP composites. The surface hydrophobic properties, crystallization properties, molecular structure, mechanical properties, thermal properties, and microstructures of the blends were characterized by contact angle measurement, differential scanning calorimetry, Fourier⁃transform infrared spectroscopy, universal testing machine, thermogravimetric analyzer, and scanning electron microscopy. The results indicated that the addition of EHBP reduced the degree of crystallinity of PLA. The compatibility between PLA and talc powders was best for the composites at a EHBP content of 2 phr. The addition of EHBP enhanced the mechanical properties and toughness of the composites. The composites obtained a significant improvement in the mechanical properties at a EHBP content of 2 phr, leading to an increase in elongation at break by 29.3 %, in impact strength by 49.8 %, and in tensile strength by 31.3 %.

Key words: poly(lactic acid), talc, epoxy?terminated hyperbranched polyester, compatibility

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