All three blends, physical mixtures and parent glasses were thermally characterised by TGA and DSC measurements (Figure ). TGA shows an earlier mass loss of the blends versus the parent glasses, indicating decreased thermal stability of the blends. Initial mass loss corresponding to surface water loss of 2.3% and 2.4%, and Tds of 236.8 °C and 249.7 °C was observed for the 1:1 and 1:3 samples, respectively (Figure ). The TGA trace for the 1:6 sample displays an initial mass loss of 1.9% until 245 °C, corresponding to surface water loss (Figure ). Above 245 °C there is minor mass loss of 4.3% until the main onset of decomposition at 388.6 °C. To understand this decreased thermal stability, TGA was performed on the pristine starting materials heat treated under the same experimental conditions used for the blends. A mall decrease in thermal stability was observed (Figure , S9b), but this was much smaller than the reduced thermal stability of the blends; the latter could be indicative of an interaction between the two components.