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Efficient Load Transfer to Polymer-Grafted Multiwalled Carbon Nanotubes in Polymer Composites

机译:聚合物复合物中聚合物接枝的多壁碳纳米管的有效载荷转移

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摘要

Multiwalled carbon nanotubes (MWNTs) grafted with poly(methyl methacrylate) (PMMA) were synthesized by emulsion reactions and used as a reinforcement for commercial PMMA. Both scanning electron microscopy (SEM) and transmission electron microscopy (TEM) revealed that the applied tensile load on the composites was transferred to the PMMA-grafted MWNTs, leading to a strain failure of the MWNTs rather than an adhesive failure between the MWNTs and the matrix. Dynamic mechanical analysis (DMA) data showed that the storage modulus at 20 °C of the PMMA composite containing 20 wt.-% of the PMMA-grafted MWNTs was significantly enhanced by ~29 GPa (or by ~1100 %) as compared with commercial PMMA.
机译:通过乳液反应合成了接枝聚甲基丙烯酸甲酯(PMMA)的多壁碳纳米管(MWNTs),并用作商业PMMA的增强剂。扫描电子显微镜(SEM)和透射电子显微镜(TEM)均显示,复合材料上施加的拉伸载荷转移到了接枝PMMA的MWNT上,导致MWNT的应变失效,而不是MWNT与HTNT之间的粘合失效。矩阵。动态力学分析(DMA)数据表明,与市售的PMMA复合材料相比,含20%(重量)PMMA接枝的MWNTs的PMMA复合材料在20°C时的储能模量显着提高了约29 GPa(或约1100%)。亚克力。

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