| 초록 |
CNT localization in PA66/mPPE/CNT nanocomposites was determined using several methods, including TEM/EDS techniques, surface energy and wetting coefficient calculations, and electrical conductivity measurements. The CNTs were found to be dispersed preferentially in the PA66 phase and not in the mPPE phase due to the higher affinity of the CNTs for PA66. CNT localization in the PA66 phase significantly increased the electrical conductivity of the PA66/mPPE/CNT nanocomposites relative to the PA66/CNT nanocomposites at the same CNT loading due to the higher effective CNT content in the PA66 phase. The nanocomposite prepared by mixing mPPE and CNTs, followed by blending the mixture with PA66, yielded a higher electrical conductivity because the CNTs dispersed initially in the mPPE phase transferred as individual rods rather than as agglomerates into the PA66 phase. The individual CNTs then were uniformly dispersed in the PA66 phase by a proposed mechanism described as a “filler-transfer-induced dispersion”. |
