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基于D-A反应的热可逆聚氨酯合成及其碳纤维复合材料的制备与性能

闫欣悦 丁楠洋 王成忠

闫欣悦, 丁楠洋, 王成忠. 基于D-A反应的热可逆聚氨酯合成及其碳纤维复合材料的制备与性能[J]. 复合材料学报, 2024, 41(4): 1914-1922. doi: 10.13801/j.cnki.fhclxb.20230816.001
引用本文: 闫欣悦, 丁楠洋, 王成忠. 基于D-A反应的热可逆聚氨酯合成及其碳纤维复合材料的制备与性能[J]. 复合材料学报, 2024, 41(4): 1914-1922. doi: 10.13801/j.cnki.fhclxb.20230816.001
YAN Xinyue, DING Nanyang, WANG Chengzhong. Synthesis of thermoreversible polyurethane based on D-A reaction and preparation and properties of its carbon fiber composites[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 1914-1922. doi: 10.13801/j.cnki.fhclxb.20230816.001
Citation: YAN Xinyue, DING Nanyang, WANG Chengzhong. Synthesis of thermoreversible polyurethane based on D-A reaction and preparation and properties of its carbon fiber composites[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 1914-1922. doi: 10.13801/j.cnki.fhclxb.20230816.001

基于D-A反应的热可逆聚氨酯合成及其碳纤维复合材料的制备与性能

doi: 10.13801/j.cnki.fhclxb.20230816.001
详细信息
    通讯作者:

    王成忠,博士,副教授,硕士生导师,研究方向为高性能树脂基复合材料 E-mail: czwang@mail.buct.edu.cn

  • 中图分类号: TB332

Synthesis of thermoreversible polyurethane based on D-A reaction and preparation and properties of its carbon fiber composites

  • 摘要: 以二异氰酸酯(MDI)、聚醚多元醇(PTMG)和2, 5-呋喃二甲醇合成了含有呋喃结构的线型聚氨酯,与双马来酰亚胺基二苯甲烷(BMI)通过Diels-Alder反应制备了热可逆聚氨酯固化物,并制备了碳纤维单向复合材料。通过高温红外和DSC分析了聚氨酯树脂的热可逆行为,研究了树脂的溶解性、熔融再加工性及力学性能,分析了碳纤维复合材料的力学性能和动态机械性能。结果表明:热可逆聚氨酯固化物在热循环中有反复断键-交联行为,160℃左右可完成逆反应;采用高温溶剂溶解法或热熔法均可以进行再加工,再加工3次后仍能保持原有力学性能;碳纤维单向复合材料的层间剪切呈二次失效特点,层间剪切强度为34.85 MPa,玻璃化转变温度为93.73℃。

     

  • 图  1  热可逆聚氨酯的合成路线

    Figure  1.  Synthetic route of thermoreversible polyurethane

    图  2  含呋喃环线型聚氨酯及热可逆聚氨酯固化物红外图谱

    Figure  2.  Infrared spectra of line type polyurethane containing furan rings and cured thermoreversible polyurethane

    图  3  热可逆聚氨酯固化物的升降温DSC曲线

    Figure  3.  Temperature heating and cooling DSC curves of cured thermoreversible polyurethane

    图  4  热可逆聚氨酯高低温红外图谱

    Figure  4.  High and low temperature infrared spectra of thermoreversible polyurethane

    图  5  单向碳纤维/热可逆聚氨酯复合材料层剪应力-应变曲线

    Figure  5.  Stress-strain curve of unidirectional carbon fiber/thermoreversible polyurethane under interlaminar shear

    图  6  层剪测试前(a)、后((b), (c))单向碳纤维/热可逆聚氨酯复合材料的SEM图像

    Figure  6.  SEM images of unidirectional carbon fiber/thermoreversible polyurethane before (a) and after ((b), (c)) interlayer shear test

    图  7  单向碳纤维/热可逆聚氨酯复合材料的DMA曲线

    Figure  7.  DMA curves of unidirectional carbon fiber/thermoreversible polyurethane

    E'—Storage modulus; E''—Loss modulus; tanδ—Dissipation factor

    表  1  热可逆聚氨酯再加工后力学性能

    Table  1.   Mechanical properties of thermoreversible polyurethane after reprocessing

    High-temperature dissolution processHot-melt process
    Tensile strength/MPaBreak at elongation/%Tensile strength/MPaBreak at elongation/%
    Original sample25.2±376.7±1525.2±376.7±15
    1st reprocessed27.3±372.3±1523.4±375.5±15
    2nd reprocessed31.3±368.9±1523.0±376.1±15
    3rd reprocessed30.0±369.2±1523.0±374.2±15
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  • 收稿日期:  2023-05-30
  • 修回日期:  2023-07-29
  • 录用日期:  2023-08-03
  • 网络出版日期:  2023-08-16
  • 刊出日期:  2024-04-15

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