中国塑料 ›› 2025, Vol. 39 ›› Issue (6): 31-35.DOI: 10.19491/j.issn.1001-9278.2025.06.007

• 材料与性能 • 上一篇    下一篇

PPC与PLA共混物的流变学及力学性能研究

周琦1,2,3, 李全1(), 李雅静1(), 刘新安1, 谷新春1, 黄守莹3   

  1. 1.中国化学赛鼎宁波工程有限公司,浙江 宁波 315048
    2.宁波工程学院材化学院,浙江 宁波 315211
    3.天津大学化工学院,天津 300354
  • 收稿日期:2025-01-09 出版日期:2025-06-26 发布日期:2025-06-20
  • 通讯作者: 李全,liquan@sedinnb.com
    李雅静,liyajing@sedinnb.com
    E-mail:liquan@sedinnb.com;liyajing@sedinnb.com

Rheological and mechanical properties of PPC and PLA blends

ZHOU Qi1,2,3, LI Quan1(), LI Yajing1(), LIU Xinan1, GU Xinchun1, HUANG Shouying3   

  1. 1.China Sedin Ningbo Engineering Co,Ltd,Ningbo 315048,China
    2.School of Material Science and Chemical Engineering,Ningbo University of Technology,Ningbo 315211,China
    3.School of Chemical Engineering,Tianjin University,Tianjin 300354,China
  • Received:2025-01-09 Online:2025-06-26 Published:2025-06-20
  • Contact: LI Quan, LI Yajing E-mail:liquan@sedinnb.com;liyajing@sedinnb.com

摘要:

将聚乳酸(PLA)与聚碳酸亚丙酯(PPC)熔融共混,通过差示扫描量热仪、万能试验机、水蒸气通过率测试仪、旋转流变仪等测试,考察了不同比例PPC/PLA共混物的热稳定性、力学性能、水蒸气阻隔性能和流变特性。结果表明,当PLA含量超过20/100之后,两种材料出现分相,但共混物的加工性能、水蒸气阻隔性,拉伸性能等均有提高,当PPC/PLA达到100/50时,各项性能明显增强,有效改善了PPC的应用性能。

关键词: 聚碳酸亚丙酯, 聚乳酸, 流变, 力学性能, 水蒸气阻隔性

Abstract:

In this study, polylactic acid (PLA) was melt⁃blended with poly(propylene carbonate) (PPC) at varying composition ratios using a twin⁃screw extruder. The thermal stability, mechanical properties, water vapor barrier performance, and rheological behavior of the PLA/PPC blends were systematically analyzed via differential scanning calorimetry, universal tensile testing, water vapor transmission rate measurements, and rotational rheometry. The results indicated that phase separation occured between PLA and PPC when the PLA/PPC ratio exceeded 20/100. Despite this, the blends exhibited enhanced processing performance, improved water vapor barrier properties, and superior tensile strength. Notably, when the PLA/PPC ratio surpassed 50/100, all evaluated properties, including rheological behavior, barrier efficiency, and mechanical performance, demonstrated significant improvement.

Key words: polypropylene carbonate, polylactic acid, rheological property, mechanical property, water vapor barrier property

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