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过程工程学报 ›› 2022, Vol. 22 ›› Issue (3): 413-420.DOI: 10.12034/j.issn.1009-606X.221087

• 研究论文 • 上一篇    

界面增容剂的结构对PLA/PP共混体系界面状态及性能的影响

樊炳宇1， 陈鑫亮1， 杨利1， 高尚1， 谢永健1， 王振峰1， 王平1,2*， 刘瑾1,2*   

  1. 1. 安徽建筑大学材料与化学工程学院，安徽 合肥 230601 2. 安徽建筑大学安徽省先进建筑材料国际联合研究中心，安徽 合肥 230601
  • 收稿日期:2021-03-17 修回日期:2021-05-24 出版日期:2022-03-28 发布日期:2022-03-28
  • 通讯作者: 王平 anjzwp@ahjzu.edu.cn
  • 作者简介:樊炳宇(1996-)，男，安徽省六安市人，硕士研究生，功能高分子与化学建材专业，E-mail: fanby@ahjzu.edu.cn；通讯联系人，王平， E-mail: anjzwp@ahjzu.edu.cn；刘瑾，E-mail: liujin@ahjzu.edu.cn.
  • 基金资助:
    安徽高校协同创新项目;国家自然科学基金;安徽省高校省级自然科学研究项目;安徽建筑大学博士启动基金;中央高校基本科研业务费专项资金资助;合肥市科技公关重大研发项目; 芜湖市重点研发项目;安徽省博士后研究人员科研活动经费资助项目

The influence of the structure of the interfacial compatibilizer on the interfacial state and performance of the PLA/PP blends

Bingyu FAN1,  Xinliang CHEN1,  Li YANG1,  Shang GAO1,  Yongjian XIE1,  Zhenfeng WANG1,  #br# Ping WANG1,2*,  Jin LIU1,2*   

  1. 1. School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei, Anhui 230601, China 2. Anhui Province International Research Center on Advanced Building Materials, Anhui Jianzhu University, Hefei, Anhui 230601, China
  • Received:2021-03-17 Revised:2021-05-24 Online:2022-03-28 Published:2022-03-28

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摘要： 通过在聚乳酸(PLA)和聚丙烯(PP)共混体系中分别引入马来酸酐接枝乙烯-辛烯共聚物(POE-g-MAH)和甲基丙烯酸缩水甘油酯接枝乙烯-辛烯共聚物(POE-g-GMA)，制备出具有不同结构及性能的共混材料(PLA/PP/POE-g-MAH，PLA/PP/POE-g-GMA)，并采用转矩流变仪、扫描电子显微镜、差示扫描量热仪、平板流变仪及电子万能试验机等研究了不同界面增容剂的结构对PLA/PP共混体系界面状态及性能的影响。结果表明，POE-g-MAH和POE-g-GMA均可改善PLA与PP的相界面形态，但与POE-g-GMA相比，POE-g-MAH的界面催化效率更高，对PLA/PP共混体系增容效果更好，其可诱导PLA与PP在界面处形成微交联结构，增强PLA与PP的界面相互作用，改善材料的机械性能，当添加4wt%的POE-g-MAH时，PLA/PP/POE-g-MAH共混物的拉伸强度达29.7 MPa，断裂伸长率提升至39.3%，较PLA/PP样品提高了8倍；并且共混材料的冲击强度随着POE-g-MAH含量的增加而增加，当其添加量为6wt%时，材料冲击强度达30.1 kJ/m2，材料具有较好的刚韧平衡性。

关键词: 聚乳酸, 聚丙烯, 类双连续相, 马来酸酐接枝乙烯-辛烯共聚物, 甲基丙烯酸缩水甘油酯接枝乙烯-辛烯共聚物

Abstract: Maleic anhydride grafted ethylene-octene copolymer (POE-g-MAH) and glycidyl methacrylate grafted ethylene-octene copolymer (POE-g-GMA) were introduced into the polylactic acid (PLA)/polypropylene (PP) blends to prepare different structures and performance blended materials (PLA/PP/POE-g-MAH, PLA/PP/POE-g-GMA). The effects of compatibilizers with different structures on the regulation behavior of interface state and performance of PLA/PP blends were investigated by the torque rheometer, DSC, SEM, flat rheometer and electronic universal testing machine, etc. The results showed that both POE-g-MAH and POE-g-GMA could improve the interface morphology of PLA and PP, but compared with POE-g-GMA, the interface catalytic efficiency of POE-g-MAH was higher, which could induce PLA and PP more compatible, and catalyzed the formation of micro cross-linking structure at the interface between PLA and PP, which enhance the interfacial interaction between PLA and PP, and finally improved the mechanical properties of the material. When 4wt% POE-g-MAH was introduced, the tensile strength of the PLA/PP/POE-g-MAH blend reached 29.7 MPa, and the elongation at break increased to 39.3%, which was 8 times higher than that of PLA/PP sample. Also, the impact strength of the samples enhanced with the increase of the content of POE-g-MAH, and when its addition amount was 6wt%, the impact strength of the material reached 30.1 kJ/m2, which had a good balance of rigidity and toughness.

Key words: polylactic acid, polypropylene, quasi bi-continuous structure, Maleic anhydride grafted ethylene-octene copolymer, glycidyl methacrylate grafted ethylene-octene copolymer