高等学校化学学报

高等学校化学学报 ›› 2020, Vol. 41 ›› Issue (8): 1881.doi: 10.7503/cjcu20200157

• 高分子化学 • 上一篇    下一篇

生物基超韧聚乳酸复合材料的制备与性能

夏艺玮, 王光鑫, 冯玉林, 胡跃鑫, 赵桂艳   

  1. 辽宁石油化工大学石油化工学院, 抚顺 113001
  • 收稿日期:2020-03-19 出版日期:2020-08-10 发布日期:2020-08-01
  • 通讯作者: 赵桂艳,女,博士,副教授,主要从事聚合物共混改性研究.E-mail:gyzhao@lnpu.edu.cn E-mail:gyzhao@lnpu.edu.cn
  • 基金资助:
    辽宁省教育厅科研基金（批准号：L2019013）、辽宁石油化工大学国家级科研项目培育基金（批准号：2016PY-014）和辽宁石油化工大学引进人才科研启动基金（批准号：2016XJJ-001）资助.

Preparation and Properties of Biobased Super-tough Poly(lactic acid) Composites

XIA Yiwei, WANG Guangxin, FENG Yulin, HU Yuexin, ZHAO Guiyan   

  1. School of Petrochemical Engineering, Liaoning Shihua University, Fushun 113001, China
  • Received:2020-03-19 Online:2020-08-10 Published:2020-08-01
  • Supported by:
    Supported by the Scientific Research Fund of Liaoning Provincial Education Department, China(No.L2019013), the Talent Scientific Research Fund of LSHU, China(No.2016XJJ-001) and the Scientific Research Cultivation Fund of LSHU, China(No.2016PY-014).

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摘要： 采用来源于可再生资源的聚醚酰胺弹性体（PEBA）增韧聚乳酸（PLA）制备超韧聚乳酸（PLA/PEBA-GMA）复合材料.为了提高PEBA与PLA之间的相容性，选择极性单体甲基丙烯酸缩水甘油酯（GMA）、共接枝单体乙烯基吡咯烷酮（NVP）及引发剂过氧化二异丙苯（DCP）对PEBA进行接枝改性制备PEBA-GMA.研究了接枝单体组分的用量（m/g）对PLA/PEBA-GMA复合材料性能的影响.研究发现，随着接枝单体组分用量的提高，复合材料的缺口冲击强度逐渐增大，当接枝单体组分GMA，NVP和DCP的用量分别为2.5，2.5和0.25 g时，复合材料的冲击强度高达88.6 kJ/m2，断裂伸长率为164.1%.研究表明，在熔融共混过程中，聚乳酸的端基（—OH和—COOH）与PEBA-GMA上环氧基团发生反应，有效改善两相间的界面相容性，随着接枝单体组分比例的提高，分散相PEBA-GMA的粒子尺寸逐渐减小且分布均匀.

关键词: 聚乳酸, 聚醚酰胺, 接枝改性, 增韧

Abstract: Biobased poly(ether-block-amide)(PEBA) was used to toughen poly(lactic acid)(PLA) to prepare super-tough PLA composites. In order to improve the compatibility between PEBA and PLA, PEBA-GMA was prepared by graft modification of PEBA by monomer glycidyl methacrylate(GMA), comonomer vinyl pyrrolidone(NVP) and initiator diisopropyl peroxide(DCP). The effect of the adding amounts of grafted monomers on the properties of PLA/PEBA-GMA composites was investigated. The results exhibit that the notched impact strength of the PLA composites increases gradually with the rise of the adding amount of grafted monomers. When the amount of grafted monomers GMA, NVP, DCP were 2.5, 2.5, 0.25 g respectively, the impact strength of the blends was as high as 88.6 kJ/m2 and the elongation at break was up to 164.1%. It is explained that the end groups of polylactic acid(-OH and -COOH) reacts with the epoxy groups on PEBA-GMA during melt blending, which improves the interfacial compatibility between the PLA and PEBA-GMA. With the increase of the adding amounts of grafted monomers, the particle size of the dispersed phase PEBA-GMA decreased gradually and dispersed evenly. As a result, super-tough PLA composite was prepared.

Key words: Poly(lactic acid), Poly(ether-block-amide), Graft, Toughenness

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