Modular advanced rheometer system haake mars 60

The rheological analysis of starch suspensions (15% w/w) was carried out using a controlled stress rheometer (Modular Advanced Rheometer System Haake Mars 60, Thermo-Scientific, Dreieich, Germany), following the methodology of López-Barraza et al. [70 (link)], equipped with rough plate geometry (35 mm in diameter and GAP in diameter) to prevent wall slip effects.
The stress amplitude sweep test for starch suspensions was carried out within the range of 0.001 to 1000 Pa and with an angular frequency of 1 Hz at 25 °C in order to determine the linear viscoelastic regime.
Thermo-viscoelasticity properties were investigated with a ramp temperature of 40 to 90 °C, at a constant frequency (1 Hz) in the linear viscoelasticity regime and a heating rate of 5 °C/min.

To be able to describe the print behavior of the polymers and blends used, the rheological properties were investigated (n = 1). The viscosity was measured with a Modular Advanced Rheometer System (HAAKE MARS 60, Thermo Fisher Scientific, Waltham, MA, USA). Samples of 500 mg each were weighed in. The gap was adjusted to 1 mm and an angular speed of 6.3 rad/s was set. A temperature range was scanned to be able to follow the viscosity curve of the polymers. This range covered the print temperature used. The data was recorded with HAAKE RheoWin (4.87.0006, Thermo Fisher, Waltham, MA, USA) with a frequency of 1 Hz. For the measurements, the API was replaced with mannitol to reduce the toxicity profile of the mixtures.