Despite the clear differences in mechanical performance, the thermal and electrical conductivity data appear less susceptible to the different filler-matrix dispersions. This is due to the relatively low loadings used, leading to large interparticle gaps, and thus no percolative networks. The high density distribution of PG-CF particulates should favour the creation of connected filler networks, and this effect can be observed as its thermal conductivity values tend to outperform the other GNPs as the loadings increase.