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30 March 2010 Shape-memory polymer composite filled with carbon nanotube
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In addition to the preparation of carbon nanotube (CNT)/epoxy shape memory composites, the thermo-mechanical properties of the composites are focused on. Furthermore, the factors which would influence thermo-mechanical properties of the composites are studied too. Four types of test were carried out, namely, differential scanning calorimetry (DSC), dynamic mechanical analyzer (DMA) test, quasi-static tension test and shape memory behavior. The results of DSC show that CNT decreases the glass transition temperature of the composites. From DMA test, a sharp drop can be found in each composite, which indicates that the composites are typical shape memory polymer materials. And elastic ratio of the composites decreases with increasing CNT content. Tensile test indicates that tensile strength increases and then decreases with the increasing CNT content ranging from 1 wt% to 3 wt%. Study on shape recovery behaviors of the composites showed that each composite can reach a shape recovery ratio near 99%.
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Xuelian Wu, Hui Zheng, Yanju Liu, and Jinsong Leng "Shape-memory polymer composite filled with carbon nanotube", Proc. SPIE 7644, Behavior and Mechanics of Multifunctional Materials and Composites 2010, 764422 (30 March 2010);

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