This study aimed to prepare and characterize PAA/carbonized waste rubber composites. Composites containing different proportions of PAA, and carbonized waste rubber were prepared (0.5%, 1% and 2% carbonized waste rubber by weight of PAA). Structural characterization of the prepared composites was carried out using FT-IR and XRD techniques. Thermal stability was examined with the TGA/DTG technique. Their morphologies were investigated using SEM. It is evaluated that the thermal stability of PAA is increased by preparing the composites obtained from all the results and the obtained composites can be used in areas where the thermal management of the electronic product is required.