During the second heating (Figure ), the glass transition temperature, Tg of all materials before and after the degradation remained almost the same (-47 °C) while a decrease of specific heat capacity, ΔCp was observed after the degradation. This decrease in ΔCp may be explained by the decrease of molecular weight, which was observed in NMR and GPC measurements (see Table ), as it requires more energy to increase the kinetic motion of a higher molecular weight structure compared to a lower molecular weight one .