CHINESE JOURNAL OF ENERGETIC MATERIALS
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DMA方法研究多壁碳纳米管/F2314复合材料的粘弹性能
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(中国工程物理研究院化工材料研究所, 四川 绵阳 621999)

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林聪妹(1985-),女,助理研究员,主要从事高聚物粘结炸药的配方设计和性能研究。e-mail: lincmei2009@163.com

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Characterization Viscoelastic Properties of Multi-walled Carbon Nanotubes/F2314 Composites Using DMA Method
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(Institute of Chemical Materials, CAEP, Mianyang 621999, China)

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    摘要:

    用熔融共混法制备了多壁碳纳米管(MWCNTs)/氟聚物(F2314)复合材料。用动态机械热分析(DMA)法考察了MWCNTs含量对复合材料粘弹性能(动态力学行为和三点弯曲蠕变性能)的影响。结果表明,随着MWCNTs含量的增加,MWCNTs/F2314复合材料的储能模量增加,玻璃化转变温度和损耗因子峰值(tanδmax)减小。MWCNTs的存在使得MWCNTs/F2314复合材料的蠕变应变和稳态蠕变速率减小。80 ℃/0.1 MPa下,当MWCNTs含量从2%增加到20%时,MWCNTs/F2314复合材料的蠕变应变和稳态蠕变速率分别减小87.6%和84.7%。Burger四元件模型可以模拟MWCNTs/F2314复合材料的蠕变行为,并获得蠕变曲线的本构方程。

    Abstract:

    Multi-walled carbon nanotubes (MWCNTs)/fluoropolymer (F2314) composites were prepared via a melt blending process The influences of MWCNTs content on the viscoelastic properties (dynamic mechanical behavior and three-point bending creep properties of MWCNTs/F2314) were explored using dynamic mechanical analysis (DMA) method. The results show that with increasing the MWCNTs content, the storage modulus (E′) of MWCNTs/F2314 composites increases, the glass transition temperature (Tg) and peak value of loss factor (tanδmax) decrease. The creep strain and constant creep strain rate of MWCNTs/F2314 composites distinctly decrease due to the presence of MWCNTs. At 80 ℃/0.1 MPa, when the MWCNTs content(mass fraction) increases from 2% to 20%, the creep strain and constant creep strain rate of MWCNTs/F2314 composites decrease by 87.6% and 84.7%, respectively. Burger four-element mechanical model can be used to simulate the creep behaviors of MWCNTs/F2314 composites and obtain the constitutive equations of creep curves.

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引用本文

林聪妹,刘佳辉,刘世俊,等. DMA方法研究多壁碳纳米管/F2314复合材料的粘弹性能[J].含能材料, 2015, 23(2):140-145. DOI:10.11943/j. issn.1006-9941.2015.02.007.
LIN Cong-mei, LIU Jia-hui, LIU Shi-jun, et al. Characterization Viscoelastic Properties of Multi-walled Carbon Nanotubes/F2314 Composites Using DMA Method[J]. Chinese Journal of Energetic Materials, 2015, 23(2):140-145. DOI:10.11943/j. issn.1006-9941.2015.02.007.

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历史
  • 收稿日期: 2013-11-17
  • 最后修改日期: 2014-01-06
  • 录用日期: 2014-02-25
  • 在线发布日期: 2015-02-09
  • 出版日期: 2015-02-12