2.5.2. Dynamic mechanical thermal analysis (DMTA)
The samples used for DMTA were cut from narrow sections of tensile bars with dimensions of 17.0 mm 6.0 mm. The samples were dried at 40 8C for about 2 days and then stored in desiccators until they were used. The thermomechanical experiments were performed on a dynamic mechanical
analyser (DMA-Q800, TA Instruments) at a heating rate of 3 8C/min and at a frequency of 1 Hz.