中国塑料 ›› 2025, Vol. 39 ›› Issue (9): 44-48.DOI: 10.19491/j.issn.1001-9278.2025.09.007

• 材料与性能 • 上一篇    下一篇

过氧化物交联增黏PE/PE⁃g⁃MAH

任百霞1(), 陈学连1, 李亚飞2, 张文秀1, 郭窗月1   

  1. 1.国能(北京)新材料科技有限公司,北京 102211
    2.北京低碳清洁能源研究院,北京 102211
  • 收稿日期:2024-10-08 出版日期:2025-09-26 发布日期:2025-09-22
  • 作者简介:任百霞,renbaixia9@163.com

Adhesion enhancement of PE/PE⁃g⁃MAH via crosslinking by peroxide

REN Baixia1(), CHEN Xuelian1, LI Yafei2, ZHANG Wenxiu1, GUO Chuangyue1   

  1. 1.CHN Energy (Beijing) New Materials Technology Co,Ltd,Beijing 102211,China
    2.National Institute of Clean?and?Low?Carbon Energy,Beijing 102211,China
  • Received:2024-10-08 Online:2025-09-26 Published:2025-09-22

摘要:

采用过氧化物交联剂1,3⁃双(叔丁基过氧异丙基)苯(BIPB)对聚乙烯(PE)/马来酸酐接枝聚乙烯(PE⁃g⁃MAH)进行增黏改性。通过FTIR表征了材料结构,测试了交联前后材料表面的氧元素含量、黏结强度以及拉伸断裂强度,DSC分析了材料热性能,通过SEM观察了材料与金属的界面形貌和拉脱测试后的表面形貌。结果表明,交联前,材料表面氧元素含量来自马来酸酐(MAH)和BIPB,交联后,BIPB中氧元素随小分子挥发,材料表面氧元素主要来自MAH,随着交联度提高,交联材料界面的MAH含量提高;交联后材料界面形成特殊形貌,Tco 由116.99 ℃降低至113.17 ℃,随着BIPB含量由0.1份增加至0.5份,交联材料结晶度由49.4 %降低至42.2 %,拉伸强度由13.2 MPa降低至11.1 MPa,黏结强度由4.01 MPa降低至3.53 MPa。

关键词: 过氧化物交联, 聚乙烯, 黏结改性, 马来酸酐接枝聚乙烯

Abstract:

The modification of polyethylene (PE) and maleic anhydride (MAH)⁃grafted PE were investigated using the peroxide crosslinking agent 1,3⁃bis(tert⁃butylperoxyisopropyl)benzene (BIPB). The crosslinked materials were systematically characterized through FTIR spectroscopy, surface oxygen content analysis, mechanical testing, and thermal analysis. Results revealed distinct oxygen sources in crosslinkable versus crosslinked materials: while MAH and BIPB contributed oxygen in uncrosslinked powders, only MAH⁃derived oxygen remained after crosslinking due to BIPB decomposition. Increasing crosslinking degree led to MAH enrichment at material interfaces and the formation of distinctive interfacial morphology, accompanied by a decrease in crystallization onset temperature from 116.99 to 113.17 °C. As BIPB content increased from 0.1 to 0.5 phr, significant property changes were observed as follows: crystallinity decreased from 49.4 % to 42.2 %, tensile strength declined from 13.2 MPa to 11.1 MPa, and bonding strength reduced from 4.01 MPa to 3.53 MPa. These findings provide crucial insights into the structure⁃property relationships of peroxide⁃crosslinked PE systems, particularly regarding the competing effects of crosslinking density and crystallinity on mechanical performance.

Key words: peroxide crosslinking, polyethylene, adhesion modification, maleic anhydride grafted polyethylene

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