The rheometric investigations were performed in
controlled-stress and controlled-strain modes on an
Anton Paar, Physica MCR 501 modular rheometer
provided with a Peltier system for temperature control.
A solvent trap was used to avoid solvent evaporation.
All measurements were carried out in parallel-plate
geometry with a diameter of 50 mm, and a gap of 1
mm. The temperature of the tested samples was
maintained at 25 °C for the amplitude (AS) and
frequency (FS) sweep tests. For the temperature tests, a
constant strain was chosen, in acordance with the
linear viscoelastic domain, a constant frequency of 1
Hz, and the temperature was swept with 1 °C per
minute between 20 and 50 °C.