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不同环氧当量超支化环氧树脂/双酚A型环氧树脂固化体系的相结构

程娟 王怡莓 张俊珩 许泽军 张道洪

程 娟, 王怡莓, 张俊珩, 等. 不同环氧当量超支化环氧树脂/双酚A型环氧树脂固化体系的相结构[J]. 功能高分子学报,2022,35(3):1-8 doi: 10.14133/j.cnki.1008-9357.20210511002
引用本文: 程 娟, 王怡莓, 张俊珩, 等. 不同环氧当量超支化环氧树脂/双酚A型环氧树脂固化体系的相结构[J]. 功能高分子学报,2022,35(3):1-8 doi: 10.14133/j.cnki.1008-9357.20210511002
CHENG Juan, WANG Yimei, ZHANG Junheng, XU Zejun, ZHANG Daohong. Phase Structure of Hyperbranched Epoxy Resin / Bisphenol A Epoxy Resin Curing System with Different Epoxy Equivalents[J]. Journal of Functional Polymers. doi: 10.14133/j.cnki.1008-9357.20210511002
Citation: CHENG Juan, WANG Yimei, ZHANG Junheng, XU Zejun, ZHANG Daohong. Phase Structure of Hyperbranched Epoxy Resin / Bisphenol A Epoxy Resin Curing System with Different Epoxy Equivalents[J]. Journal of Functional Polymers. doi: 10.14133/j.cnki.1008-9357.20210511002

不同环氧当量超支化环氧树脂/双酚A型环氧树脂固化体系的相结构

doi: 10.14133/j.cnki.1008-9357.20210511002
基金项目: 国家自然科学基金(51873233,51403241)
详细信息
    作者简介:

    程娟:程 娟(1980—),女,湖北鄂州人,博士,主要研究方向为超支化环氧树脂。E-mail:cjwzk@163.com

    通讯作者:

    张道洪,E-mail:zhangdh27@163.com

  • 中图分类号: O636.1

Phase Structure of Hyperbranched Epoxy Resin / Bisphenol A Epoxy Resin Curing System with Different Epoxy Equivalents

  • 摘要: 采用光学显微镜研究了不同环氧当量的端羟基超支化环氧树脂(EHBP-n, n=3, 6, 9, 12)/双酚A型环氧树脂(EHBP-n/DGEBA)固化体系的相结构,探讨了EHBP-n/DGEBA固化产物的微观形貌和力学性能的关系。结果表明:随着端羟基超支化环氧树脂质量分数的增加和环氧当量的减小,固化产物的相容性提高。固化微观结构中粒子的尺寸越大,力学性能越好。原位在线观察了9%EHBP-12/DGEBA(EHBP-12的质量分数:9%)的固化过程,提出了均相结构形成的机理。用差示扫描量热法研究了EHBP-12/DGEBA的固化动力学,用扫描电镜背散射电子成像对固化产物的元素分布进行分析,进一步说明EHBP-n与DGEBA具有良好的相容性。

     

  • 图  1  EHBP-n,DEGBA与DETA-AN的化学结构(以EHBP-3为例)

    Figure  1.  Chemical structures of EHBP-n, DEGBA, and DETA-AN (taking EHBP-3 as an example)

    图  2  不同EHBP-12质量分数的EHBP-12/DGEBA混合物在50 °C固化时的光学量微镜照片

    Figure  2.  Optical microscope images of EHBP-12/DGEBA blends cured at 50 °C containing different mass fractions of EHBP-12

    图  3  9% EHBP-n/DGEBA混合物在50 °C固化后的光学显微镜照片

    Figure  3.  Optical microscope images of 9% EHBP-n/DGEBA blends cured at 50 °C

    图  4  EHBP-n/DGEBA固化物相容性分析

    Figure  4.  Compatibility analysis of EHBP-n/DGEBA cured compounds

    图  5  9%EHBP-12/DGEBA固化过程的光学显微镜照片: (a) 50 °C,0 min; (b) 50 °C,30 min, (c) 50 °C,60 min;(d) 60 °C,30 min;(e) 70 °C,30 min;(f)80 °C,30 min

    Figure  5.  Potical microscope images of 9%EHBP-12/DGEBA curing process: (a) 50 °C, 0 min; (b) 50 °C, 30 min; (c) 50 °C, 60 min; (d) 60 °C, 30 min; (e) 70 °C, 30 min; (f)80 °C, 30 min

    图  6  DGEBA、EHBP-12和不同EHBP-12质量分数的EHBP-12/DGEBA混合物的DSC曲线

    Figure  6.  DSC curves of DGEBA, EHBP-12 and EHBP-12/DGEBA with different mass fractions of EHBP-12

    图  7  15%EHBP-6/DGEBA 混合物的DSC曲线

    Figure  7.  DSC curves of 15%EHBP-6/DGEBA blend

    图  8  15%EHBP-3/DGEBA固化物的Mapping图和元素分布

    Figure  8.  Mapping images and element distribution of the cured 15%EHBP-3/DGEBA

    表  1  不同EHBP-12质量分数的EHBP-12/DGEBA固化物的粒径及分布

    Table  1.   Particle size and distribution of EHBP-12/DGEBA cured products with different mass fractions of EHBP -12

    SampleParticle size/µmStandard deviationPDI
    DEGBA35.07.100.034
    3%EHBP-12/DEGBA38.319.990.327
    6%EHBP-12/DEGBA24.019.210.641
    9%EHBP-12/DEGBA42.118.990.204
    12%EHBP-12/DEGBA37.018.040.238
    15%EHBP-12/DEGBA22.79.810.187
    下载: 导出CSV

    表  2  9%EHBP-n/DGEBA固化物的粒径及分布

    Table  2.   Particle size and distribution of 9%EHBP-n/DGEBA cured products

    SampleParticle size/µmStandard deviationPDI
    9%EHBP-3/DGEBA45.018.470.169
    9%EHBP-6/DGEBA53.129.740.314
    9%EHBP-9/DGEBA37.519.550.272
    9%EHBP-12/DGEBA37.018.040.238
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-05-11
  • 录用日期:  2021-09-03
  • 网络出版日期:  2022-01-13

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