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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and properties of poly(methyl methacrylate)/carbon nanotube composites covalently integrated through in situ radical polymerization
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Synthesis and properties of poly(methyl methacrylate)/carbon nanotube composites covalently integrated through in situ radical polymerization

机译：原位自由基聚合共价结合的聚甲基丙烯酸甲酯/碳纳米管复合材料的合成与性能

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摘要

Poly(methyl methacrylate) (PMMA)/single-walled carbon nanotube (SWNT) composites were synthesized by the grafting of PMMA onto the sidewalls of SWNTs via in situ radical polymerization. The free-radical initiators were covalently attached to the SWNTs by a well-known esterification method and confirmed by means of thermogravimetric analysis and Fourier transform infrared spectroscopy. Scanning electron microscopy and transmission electron microscopy were used to image the PMMA-SWNT composites; these images showed the presence of polymer layers on the surfaces of debundled, individual nanotubes. The PMMA-SWNT composites exhibited better solubility in chloroform than the solution-blended composite materials. On the other hand, compared to the neat PMMA, the PMMA-SWNT nanocomposites displayed a glass-transition temperature up to 6.0°C higher and a maximum thermal decomposition temperature up to 56.6°C higher. The unique properties of the nanocomposites resulted from the strong interactions between the SWNTs and the PMMA chains.
机译：聚甲基丙烯酸甲酯（PMMA）/单壁碳纳米管（SWNT）复合材料是通过原位自由基聚合将PMMA接枝到SWNTs的侧壁上而合成的。通过众所周知的酯化方法将自由基引发剂共价附接到SWNT，并通过热重分析和傅立叶变换红外光谱法确认。用扫描电子显微镜和透射电子显微镜对PMMA-SWNT复合材料成像。这些图像显示在已解束的单个纳米管表面上存在聚合物层。 PMMA-SWNT复合材料在氯仿中的溶解度比溶液混合的复合材料好。另一方面，与纯PMMA相比，PMMA-SWNT纳米复合材料的玻璃化转变温度高出6.0℃，最大热分解温度高出56.6℃。纳米复合材料的独特性质是由于SWNT与PMMA链之间的强相互作用所致。

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