Choi Hyoung Jin, Zhang Ke, Park Seong Yong, Lee Byoung Yoon
Department of Polymer Science and Engineering, Inha University, Incheon 402-751, Korea.
J Nanosci Nanotechnol. 2009 Oct;9(10):6089-95. doi: 10.1166/jnn.2009.1564.
Multi-walled carbon nanotube (MWNTs)/poly(methyl methacrylate) (PMMA) nanocomposites were prepared by both coagulation and solvent casting methods in this study. Dispersibility of the MWNTs in the PMMA matrix was compared with each other using both scanning electron microscopy (SEM) and photograph. MWNTs from the solvent casting method were found to be dispersed better in the matrix, indicating that the dispersion state of the MWNTs depends on the preparation procedure. Moreover, using a stress-controlled rotational rheometer we investigated their rheological properties under small amplitude oscillation in their melt state. Well dispersed MWNTs in the PMMA matrix prepared by the solvent casting method efficiently blocked energy dissipation and relaxation of the PMMA chains, resulting in a lower tan delta with increased solid-like property.
本研究通过凝聚法和溶液浇铸法制备了多壁碳纳米管（MWNTs）/聚甲基丙烯酸甲酯（PMMA）纳米复合材料。使用扫描电子显微镜（SEM）和照片相互比较了MWNTs在PMMA基体中的分散性。发现通过溶液浇铸法制备的MWNTs在基体中的分散性更好，这表明MWNTs的分散状态取决于制备过程。此外，我们使用应力控制旋转流变仪研究了它们在熔融状态下小振幅振荡时的流变性能。通过溶液浇铸法制备的MWNTs在PMMA基体中良好分散，有效地阻止了PMMA链的能量耗散和松弛，导致较低的损耗角正切，同时增加了类固体性质。
