应用化学 ›› 2023, Vol. 40 ›› Issue (10): 1405-1411.DOI: 10.19894/j.issn.1000-0518.230086

• 研究论文 • 上一篇    下一篇

乙烯基三(2-甲氧基乙氧基)硅烷接枝乙烯-醋酸乙烯酯共聚物(EVA-g-VT2MES)的制备和表征

王春博1,2, 刘鹏博1, 曹增文1(), 周光远1()   

  1. 1.中国科学院大连化学物理研究所能源材料研究部,大连 116023
    2.中国科学院大学,北京 100049
  • 收稿日期:2023-04-03 接受日期:2023-07-17 出版日期:2023-10-01 发布日期:2023-10-13
  • 通讯作者: 曹增文,周光远
  • 基金资助:
    辽宁省兴辽英才计划项目(No.XLYC2008022)

Preparation and Characterization of Vinyltri(2-methoxyethoxy)silane Grafted Ethylene Vinyl Acetate Copolymer

Chun-Bo WANG1,2, Peng-Bo LIU1, Zeng-Wen CAO1(), Guang-Yuan ZHOU1()   

  1. 1.National Laboratory of Clean Energy,Dalian Institute of Chemical Physics,Dalian 116023,China
    2.University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2023-04-03 Accepted:2023-07-17 Published:2023-10-01 Online:2023-10-13
  • Contact: Zeng-Wen CAO,Guang-Yuan ZHOU
  • About author:zwcao@dicp.ac.cngyzhou@dicp.ac.cn
  • Supported by:
    Liaoning Revitalization Talents Program(XLYC2008022)

摘要:

以乙烯-醋酸乙烯酯共聚物(EVA)为基体树脂的热熔胶粘接强度较低,这主要是因为EVA的内聚强度较低及胶合表面极性单元较少。为解决这一问题,以EVA为基体,通过熔融接枝法将极性乙烯基三(2-甲氧基乙氧基)硅烷(VT2MES)接枝到EVA主链上,得到乙烯基三(2-甲氧基乙氧基)硅烷接枝乙烯-醋酸乙烯酯共聚物(EVA-g-VT2MES)。借助傅里叶变换红外光谱仪(FT-IR)和核磁共振波谱仪(NMR)对产物的分子链结构进行了表征。结果表明,VT2MES可接枝到EVA分子链上,其接枝率最高可达2.37%。通过流变和熔融指数测试表明接枝产物的内聚强度得到了提高。将EVA和EVA-g-VT2MES制成胶膜黏合钢片,对比EVA,EVA-g-VT2MES的剥离强度最大可提升75.21%,表明了在EVA分子链上熔融接枝VT2MES可以大幅提高EVA基体的粘接强度。

关键词: 乙烯-醋酸乙烯酯共聚物, 熔融接枝, 接枝率, 内聚强度, 粘接强度

Abstract:

The low hot melt adhesive strength of ethylene vinyl acetate (EVA) as a matrix resin is mainly due to its low cohesive strength and low polarity on the bonding surface. To address this issue, polar vinyltri(2-methoxyethoxy)silane (VT2MES) is grafted onto the EVA main chain through a melt grafting method, resulting in the synthesis of ethylene vinyl acetate grafted with vinyltri(2-methoxyethoxy)silane (EVA-g-VT2MES). The molecular chain structure of the product is characterized using Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance spectroscopy (NMR), indicating that VT2MES hasbeen successfully grafted onto the EVA molecular chain, with the highest grafting rate of 2.37%. Rheology and melt index tests demonstrate an improvement in the cohesive strength of the grafted product. Adhesive films are prepared from EVA and EVA-g-VT2MES, and steel plates are bonded with them. Compared with EVA, the peel strength of EVA-g-VT2MES is increased by up to 75.21%, confirming that melt grafting of VT2MES onto the EVA molecular chain can significantly improve the adhesion strength of the EVA matrix.

Key words: Ethylene-vinyl acetate copolymer, Melt grafting, Graft rate, Cohesive strength, Adhesion strength

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