In this study, expanded graphite (EG) was crushed and the resulting composites were filled with various amounts of EG using a melt-mix method. Thermal conductivity was then analyzed to investigate the possible synergistic enhancement through self-hybridization. Thermal conductivity was measured at an ambient temperature and normal pressure. Composites filled with 10 wt% EG and wEG fillers improved thermal conductivity, compared to composites containing one type of filler at 20 wt%....