The DMA test measurements were carried out using a Perkin Elmer Pyris Diamond 8000 Dynamic Mechanical Analyzer (Perkin Elmer, Baesweiler, Germany) in the uniaxial tensile mode at a constant frequency of dynamic mechanical loading of 1 Hz, with an amplitude of 20 µm from −125 up to 250 ◦C and at a constant heating rate of 3 ◦C ·min−1.