In all PC samples, both reprocessed by extrusion and injec- tion, and for all the reprocessing cycles, the DSC results show a unique glass transition temperature at 405–415 K (Tables 2 and 3). Tg values decreased slightly as the number of reprocessing cycles increased, due to the already observed decrease in the molecu- lar weight for all the samples during the reprocessing processes. As for the molecular weight, the decrease in the Tg values was higher in the injection reprocessing as a consequence of the higher temperature used in this process. Moreover, these values are in agreement with the behaviour observed for the polycarbonate frac- tions (Table 1), i.e., in both cases an increase of the glass transition temperature took place as the molecular weight increased.