Reasonable chemical compatibility was realised between these two glasses, with no evidence of decomposition or recrystallisation from PXRD, FTIR, Raman or 1 H NMR spectroscopy. The thermal behaviour of the materials was assessed, showing Tgs shifted relative to that of the inorganic glass. Additionally, TGA revealed decreased thermal stability relative to the starting materials and their heat-treated controls, suggesting a destabilising effect of interfacial interaction.