首页> 外文期刊>Journal of Aerospace Sciences and Technologies >DAMPING CHARACTERISTICS OF MONTMORILLONITE BASED POLYESTER/CLAY NANOCOMPOSITES
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DAMPING CHARACTERISTICS OF MONTMORILLONITE BASED POLYESTER/CLAY NANOCOMPOSITES

机译:蒙脱石基聚酯/粘土纳米复合材料的阻尼特性

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摘要

This work presents the experimental study of free vibration and damping characteristics of Polyester/Clay Nanocomposites (PCN). PCN are prepared by dispersing Un-modified Montmorillonite clay (UMT) and organically modified Montmorillonite clay (MMT) in polyester resin and subsequently cross-linked using Methyl Ethyl Keton Peroxide (MEKP) catalyst at different clay concentrations (1,2,3, and 5Wt. %). The X-ray diffraction (XRD) and Transmission Electron Microscopy (TEM) show the increasing interlayer d-spacing of both UMT and MMT which indicates the intercalated composites. Tensile test result shows that the tensile strength and modulus are increased by 55% and 43% for 5Wt % of MMT clay concentration respectively. The impact energy and heat deflection temperatures are increased by 68.27% and 25% for MMT clay respectively. The DMA studies reveal that the storage and loss modulus are increasing monotonically with increase of clay concentration. The Impulse technique and Logarithmic decrement method are used in experimental modal analysis and it is seen that increase of Wt. % of clay in polyester matrix increases the natural frequency and damping characteristics of MMT.
机译:这项工作提出了聚酯/粘土纳米复合材料(PCN)的自由振动和阻尼特性的实验研究。 PCN的制备方法是:将未改性的蒙脱土(UMT)和有机改性的蒙脱土(MMT)分散在聚酯树脂中,然后使用甲基乙基过氧化氢(MEKP)催化剂以不同的粘土浓度(1,2,3,and 5Wt。%)。 X射线衍射(XRD)和透射电子显微镜(TEM)显示UMT和MMT的层间d间距增加,表明插层了复合材料。拉伸试验结果表明,对于5Wt%的MMT粘土浓度,抗拉强度和模量分别增加了55%和43%。 MMT粘土的冲击能和热变形温度分别提高了68.27%和25%。 DMA研究表明,储能和损耗模量随粘土浓度的增加而单调增加。实验模态分析中使用了脉冲技术和对数递减法,可以看出Wt的增加。聚酯基体中粘土的%增加了MMT的固有频率和阻尼特性。

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