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Transcrystallinity and relevant interfacial strength induced by carbon nanotube fibers in a polypropylene matrix 下载免费PDF全文
For polymer composites, interfacial crystalline structures retain an important role in the macroscopic properties and are significantly affected by the processing conditions, such as the temperature, time, and external field. In this study, the transcrystallization behavior of the carbon nanotube fiber and isotactic polypropylene composite was investigated by polarizing light microscopy. The influence of the formation of the transcrystalline layer on the interfacial adhesion was evaluated by a single‐fiber fragmentation test. The results show that the growth rate of the transcrystalline layer was strongly influenced by the isothermal crystallization temperature, and the interfacial shear strength was markedly enhanced by the formation of the layer. The interfacial adhesion was further increased with the gradual perfection and growth of transcrystallinity. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132, 42119. 相似文献
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通过正交试验,对原位20Mg2Si/Al复合材料中的初生Mg2Si进行变质处理。结果表明,最佳的工艺参数是:P的加入量为0.03%,混合稀土的加入量为0.4%,变质温度为780℃,变质时间为30min。在影响变质效果的因素中,P的加入量对变质效果影响最大。混合稀土、变质温度和变质时间对试验有一定的影响。 相似文献
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《International Journal of Hydrogen Energy》2001,26(8):837-842
Diborane–tetraborane conversion in a C60 cage is theoretically considered by using AM1-RHF type semiempirical quantum chemical approach. Molecular orbital characteristics of some endohedrally boron hydride doped C60 composite systems are investigated and the likeliness of diborane–tetraborane conversion in a C60 vesicle for the purpose of hydrogen storage is discussed. 相似文献
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针对全球日益突出的食品安全问题, 如何设计出便捷的检测工具, 使消费者能够方便实时地检验食品的品质、验证食品的产地及真伪等信息显得尤为重要。互联网和智能手机的快速发展, 以及红外光谱技术在食品分析中的成功应用正在为实时检查提供可能。本文重点讨论了基于红外光谱技术的食物芳香分子检测系统、食品分子红外光谱的识别模式以及手机和互联网之间的通信解决方案, 包括原理概述、系统目标、运作流程和云计算方案, 并分析了目前的技术障碍。 相似文献
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针对基于梯度L0范数正规化的变分泛函最优化分解图像时误判噪声梯度为边缘梯度的问题,提出一种基于图像局部梯度的L0范数正规化的图像分解算法。该算法构造了一个由保真函数和正则项构成的适用于图像分解的变分泛函,其中正则项用图像的局部梯度的L0范数进行估计,进而通过求解泛函的最小值,以分解出图像的结构信息(即图像的边缘)。与直接基于图像一阶梯度的L0范数的分解算法相比,该算法可以去除噪声梯度的干扰,从而使分解出的图像边缘中不含有噪声。实验结果表明,该算法在分解图像结构和纹理时,既能很好地把边缘保留在图像结构层中,也可把噪声分解到图像结构层外。 相似文献