▎ 摘　　要

Polypyrrole (PPy)-graphene oxide (GO) composites are synthesized via a soft-chemical in situ method at different GO concentrations (10, 20, 30, 40, and 50 wt%) and with ammonium persulfate (APS) as the oxidant. The synthesized composites were characterized using Fourier transform infrared (FTIR) and ultraviolet-visible light (UV-vis) spectroscopic studies, and their surface properties were analyzed using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Characterization and surface morphology results indicate that PPy is adsorbed onto the graphene surfaces and/or fills the GO sheets. The temperature-dependent DC conductivity of the polymer composite films in the 300-500 K range indicates a semiconducting behavior with increasing GO concentration in the PPy polymer. Based on morphological and conductivity studies, the large surface area and high aspect ratio of the in situ-generated GO may have played an important role in the noticeable improvement in the electrical conductivity of the prepared composites. POLYM. COMPOS., 32:2076-2083, 2011. (C) 2011 Society of Plastics Engineers