U12-E03. AR-G2 Rheometer
Rheometer with magnetic bearings which allows measuring torques down to 0.003 N.m. It can perform either stress controlled or strain controlled measurements. The angular velocity range is 2×10-7 to 628 rad/s. The maximum measurable torque is 200 mN.m, with a resolution of 0.1 nN.m. Several geometries are available, such as concentric cylinders, cone-plate, plate-plate (different sizes) and also cross hatched plates which are suitable to measure gel samples. Temperature is controlled with a Peltier system (from -20ºC to 200ºC) and with a Upper heating plate device. There is also an interfacial rheometry accessory. The instrument’s software enables to perform a wide variety of tests and analyses.
Determination of viscosities from flow curves (stress vs shear rate); estimation of storage (elastic) modulus and loss (viscous) modulus, creep assays, temperature ramps; Determination of gel and glass points; Estimation of interfacial viscosity and moduli.