▎ 摘　　要

Three polymers, poly(vinyl alcohol) (PVA), poly(acrylic acid) (PAA) and poly(methyl methacrylate) (PMMA), are used as matrices to synthesize three nanocomposites each with reduced graphene oxide (RGO) fillers (5 wt%). The dielectric properties of these nanocomposites, RGO-PVA, RGO-PAA and RGO-PMMA, are studied in zero magnetic field and in magnetic field (H) up to 1.2 T. From these data magnetodielectric effects are obtained as the variation of epsilon ' and epsilon '' -the real and imaginary parts of complex dielectric constant with H at some frequencies. Thus at 100 kHz for the increase of H from zero to 1 T epsilon ' decreases by 5% in RGO-PVA and by 4% in RGO-PAA, whereas epsilon ' increases by 4% in RGO-PMMA. The observed magnetodielectric effects, though small, are significant. They show both decrease and increase of epsilon ' depending on the polymer. This fact is the indicative of the interaction between RGO filler particles and polymer chains.