2.3. Rheological measurements

A rheological properties test was conducted using a rotational rheometer with a parallel plate measuring system (MCR302, Anton Paar, Austria). A 1 mm thick specimen was loaded onto the test plate and heated to 40°C before measurement. Then, it was cooled from 40°C to 10°C at increments of −2°C/min. The strain was set at 1% at a frequency of 1 Hz for the dynamic moduli measurements. As the power-law equation’s coefficients remain almost constant in the shear rate range until the material is broken, the shear rate was set to 20 and 35 s⁻¹ in the rotation measurement, respectively[31].