▎ 摘　　要

The microstructure of nylon/poly(phenylene ether) (PPE)/graphene oxide (GO) composites was investigated. The major interest was focused on the effect of mixing protocol on the dispersion and localization of GO in the composites. When the three components are blended at the same time or nylon/GO is premixed prior to the blending with PPE, GO particles were mainly placed in nylon phase. By contrast, when the premixed PPE/GO is blended with nylon, the state of GO dispersion was remarkably improved to yield an exfoliated structure. Furthermore, some of the GO were found at the interface of nylon and PPE. In this particular phase structure, the average domain sizes were significantly reduced and maintained stable after the annealing process. It was found that the shear sensitivity and storage moduli of the composite were increased and the crystallization of nylon was limited by the GO platelets located at the interface of nylon and PPE.