Differential Scanning Calorimetry (MDSC) A Q2000 Differential Scanning Calorimeter (TA Instruments, New Castle, DE, USA) was used to determine the calorimetric glass transition temperature (T g,DSC , defined by the onset temperature) for each material. 2 3 mg of sample material were placed in hermetically sealed aluminium pans under a constant flow nitrogen atmosphere (flow rate 50 ml min 1 ) and cooled at a rate of 3 K min 1 from room temperature to approximately 243 K. The samples were subsequently heated at a rate of 10 K min 1 to 295 K and then at 5 K min 1 to 373 K. The modulation frequency was 0.006 K s 1 . The temperature and heat flow of the instrument were calibrated using indium (T m = 430 K, H fus = 29 J g 1 ).