For temperatures at 5 wt% and 10 wt% loss of mass, corresponding to the thermal stability of the material, it was observed that filler addition had a positive effect, except for 20% nHAp addition for which no improvement in these parameters was observed. The DTG extremum signals for the composites showed slightly lower values than for the unfilled material. The solid residue after the TGA experiment corresponds to the amount of the filler in the composition as shown in Table , which once again confirms the effectiveness of the chosen processing route .