| 초록 |
MWCNTs adsorbing various pyrene derivatives with hydroxyl groups were melt-mixed with PBT, resulting in the production of composite and the improvement in mechanical properties. 1-hydroxypyrene (PO), 1-pyrenemethanol (PMO) and 1-pyrenebutanol (PBO) were used as pyrene derivatives and each was adsorbed on the surface of MWCNTs through physisorption. The hydroxyl groups of the prepared derivatives were mixed through the transesterification reaction with the ester groups of PBT while passing the twin extruder. Formation of pyrene derivatives-MWCNTs were confirmed by FT-IR, FE-SEM, XPS and TGA. As a result, the amount of MWCNTs grafted to PBT increased in the order of PBO＞PMO＞PO according to the chain length, and the interfacial adhesion energy confirmed by drop on fiber method also increased by the same order. PBT/MWCNTs composites using PBO, which bear the biggest energy, showed a high level of dispersion and the strongest tensile strength and tensile modulus. |
