Given its higher onset of decomposition compared to the other samples, thermomechanical analysis (TMA) was used to further analyse the thermal behaviour of the 1:6 blend (Figure ). An inflection in the TMA curve occurs at 210.9 °C (i.e., a similar temperature to the Tg from DSC). TMA measurements of the pristine starting materials suggest that this inflection in the 1:6 blend probably corresponds to a softening of the inorganic component. A second inflection in the TMA curve was observed at 287.6 °C, which corresponds to the minor mass loss in the TGA trace observed before the main onset of decomposition at 388.6 °C.