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热熔法预浸料用氰酸酯树脂的性能

霍肖蒙 王帆 姚卓君 戴晶滨 朱亚平 齐会民

霍肖蒙, 王帆, 姚卓君, 等. 热熔法预浸料用氰酸酯树脂的性能[J]. 复合材料学报, 2020, 37(12): 3071-3078. doi: 10.13801/j.cnki.fhclxb.20200506.001
引用本文: 霍肖蒙, 王帆, 姚卓君, 等. 热熔法预浸料用氰酸酯树脂的性能[J]. 复合材料学报, 2020, 37(12): 3071-3078. doi: 10.13801/j.cnki.fhclxb.20200506.001
HUO Xiaomeng, WANG Fan, YAO Zhuojun, et al. Properties of cyanate ester resin for hot melt prepreg[J]. Acta Materiae Compositae Sinica, 2020, 37(12): 3071-3078. doi: 10.13801/j.cnki.fhclxb.20200506.001
Citation: HUO Xiaomeng, WANG Fan, YAO Zhuojun, et al. Properties of cyanate ester resin for hot melt prepreg[J]. Acta Materiae Compositae Sinica, 2020, 37(12): 3071-3078. doi: 10.13801/j.cnki.fhclxb.20200506.001

热熔法预浸料用氰酸酯树脂的性能

doi: 10.13801/j.cnki.fhclxb.20200506.001
基金项目: 上海航天科技创新基金(SAST2016120);中央高校基本科研业务费专项资金(50321041918013;50321041917001)
详细信息
    通讯作者:

    齐会民,博士,教授,博士生导师,研究方向为耐高温树脂及复合材料  E-mail: qihm@ecust.edu.cn

  • 中图分类号: TB332

Properties of cyanate ester resin for hot melt prepreg

  • 摘要: 采用聚醚砜(PES)对氰酸酯树脂改性,制备出PM915树脂。对PM915树脂的工艺性能和固化物性能进行了系统研究,该树脂成膜性和贮存稳定性良好,适用于热熔法预浸料工艺。研究了PM915树脂的流变性能及凝胶时间,树脂在70℃时的黏度为20 Pa·s左右,在120℃条件下可保持黏度稳定时间达115 min,160℃时凝胶时间为40 min。PM915树脂制备过程中部分反应热已释放,其拥有较低的固化放热焓,固化温度为220℃。通过引入热塑性组分PES,PM915树脂的固化收缩率低至0.16%。PM915树脂固化物具有优良的热性能,热失重5%时的温度Td5=423℃,玻璃化转变温度Tg=276℃,热膨胀系数为4.4×10−5/℃。通过热塑性树脂的改性,引入了柔性基团,进而提高了树脂固化物的韧性,PM915树脂固化物的弯曲强度和弯曲模量分别为139.3 MPa和4.2 GPa,拉伸强度和拉伸模量分别为75.8 MPa和3.8 GPa;扫描电子显微镜(SEM)表征显示PM915树脂固化物为韧性断裂。结果表明,PM915树脂是一种适用于热熔法预浸料的氰酸酯树脂基体,且具有低固化收缩率、高尺寸稳定性和优良耐热性,可应用于卫星等航天器结构件。

     

  • 图  1  双酚A型氰酸酯单体(BACy)和聚醚砜(PES)的结构式

    Figure  1.  Structures of bisphenol A cyanate monomer (BACy) and polyethersulfone (PES)

    图  2  PES改性氰酸酯树脂(PM915树脂)的流变性能

    Figure  2.  Rheological properties of cyanate ester resin modified by PES (PM915) resin

    图  3  BACy及PM915树脂的DSC曲线

    Figure  3.  DSC curves of BACy and PM915 resin

    图  4  BACy-C和PM915-C的TGA曲线和DTG曲线

    Figure  4.  TGA and DTG curves of BACy-C and PM915-C

    图  5  BACy-C和PM915-C的DMA曲线

    Figure  5.  DMA curves of BACy-C and PM915-C

    图  6  PM915-C的热膨胀曲线

    Figure  6.  Thermal expansion curve of PM915-C

    图  7  BACy-C及PM915-C的介电性能

    Figure  7.  Dielectric properties of BACy-C and PM915-C

    图  8  PM915-C的断面形貌

    Figure  8.  Morphology of PM915-C

    表  1  PM915树脂凝胶时间

    Table  1.   Gelation time of PM915 resin

    SampleGelation time t/min
    130℃140℃150℃160℃
    PM915 151 115 75 40
    下载: 导出CSV

    表  2  BACy及PM915树脂的DSC数据

    Table  2.   DSC date of BACy and PM915 resin

    SampleTi/℃Tp/℃Tf/℃ΔH/(J·g-1)
    BACy 216.2 305.9 361.5 703.8
    PM915 142.6 222.9 288.3 387.2
    Notes: Ti, Tp and Tf —Initial curing temperature, peak curing temperature and final curing temperature, respectively; ΔH—Curing exothermic enthalpy.
    下载: 导出CSV

    表  3  BACy及PM915树脂的固化收缩率

    Table  3.   Shrinkage of BACy and PM915

    Sampleρ1/(g·mL−1)ρ2/(g·mL−1)Vs/%
    BACy 1.208 1.234 2.11
    PM915 1.218 1.220 0.16
    Notes: ρ1—Density of uncured resin; ρ2—Density of cured resin; Vs—Cure shrinkage rate.
    下载: 导出CSV

    表  4  BACy-C及PM915-C的力学性能

    Table  4.   Mechanical properties of BACy-C and PM915-C

    PropertyBACy-CPM915-C
    Flexural strength/MPa 97.2 139.3
    Flexural modulus/GPa 3.7 4.2
    Tensile strength/MPa 75.8
    Tensile modulus/GPa 3.8
    Elongation/% 2.1
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-02-10
  • 录用日期:  2020-04-25
  • 网络出版日期:  2020-05-07
  • 刊出日期:  2020-12-15

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