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含能材料  2015 

DMA方法研究多壁碳纳米管/F2314复合材料的粘弹性能

DOI: 10.11943/j.issn.1006-9941.2015.02.007

Keywords: 多壁碳纳米管 含氟聚合物(F2314) 复合材料 蠕变

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Abstract:

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

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