Comparison of TG curves for pure fillers and composites calcined at 500 °C shows that fillers lose approximately 2.4 wt% (μHAp) and 4.7 wt% (nHAp) of mass up to the temperature corresponding to the total degradation of the polymer matrix. The results obtained are in good agreement with previous reports, which showed that the maximum degradation rate of poly(alkylene succinates) reached 430 °C. It has been reported that during degradation mainly vinyl-and carboxyl-terminated compounds are produced and to a lesser extent aldehydes .