2.4.3. Thermal Analysis

The thermal characteristics melting temperature (*T*m), crystallization temperature (*T*c), enthalpy of melting (ΔHm), and enthalpy of crystallization (ΔHc) were investigated using a differential scanning calorimeter (DSC, Perkin Elmer DSC7, USA). All samples were heated from −100 to 160 ◦C at a heating rate of 5 ◦C/min under the N2 atmosphere. Thus, a mass around 10 mg was sealed in an aluminum crucible for DSC-operating experiments.

## 2.4.4. Mechanical Analysis

The mechanical material properties storage modulus (*E*), loss modulus (*E*) and tan delta (tanδ) were characterized in tensile mode by dynamic mechanical analysis (DMA, Perkin Elmer, Waltham, MA, USA). The elastic behavior is observed from the storage modulus. Tan delta was the ratio of loss modulus to storage modulus. It is often called damping and informs about the energy dissipation in a material. The β-relaxation can be found at −50 ◦C which corresponds to the segmental motions in the amorphous phase. Also, the α-relaxation is detected above room temperature. The elastic properties of the material and for short-term creep can be recognized from this relaxation [29]. The DMA testing was performed on a temperature ranging from −110 to 160 ◦C at a heating rate of 5 ◦C/min with an oscillatory stress amplitude of 0.1 MPa and frequency of 1 Hz to provide the viscoelastic response.
