| Summary: | 碩士 === 東海大學 === 化學工程與材料工程學系 === 106 === In this study, the maleated-polypropylene / graphene composites is prepared by the solution method. Because the graphene surface does not have any ions and reactive functional groups, the surface of the graphite must be oxidized to produce reactive groups . The reactive groups and the reactive agents are reacted on the surface of graphite oxide by ultrasonic oscillation to organically modify graphene which could be uniformly dispersed in the organic solvent, and the ultrasonic vibration was used to make the polypropylene matrix blended with graphene evenly. The co-solvent was used to treat the maleic anhydride-polypropylene-grafted graphene, and then it was added to a polypropylene matrix to prepare a composite material, and its electrical and thermal conductivity properties were analyzed.
Polypropylene graphene nanocomposites were blended with different compositions of compatibilizers to investigate the effect of organic graphene on the dispersion, thermal conductivity, and electrical of nanocomposites. XRD and SEM were used for microstructural analysis to determine the dispersion state of organically modified graphene in composites. The composites were then analyzed by TGA to determine carbon compositions. DSC was used to analyze the crystallization behavior and thermal conductivity. The mechanical properties of the composites were determined by DMA.
Finally, the dielectric properties were measured by DEA, and the relationship between the amount of compatibilizing agent and the electrical conductivity of different matrices were compared. The experimental results showed that the polypropylene nanocomposite modified with maleated polypropylene could enhance the dispersion of graphene in the matrix, and the thermal behavious, mechanical properties, thermal and electrical conductivities were also improved.
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