peltier concentric cylinder - TA Instruments

Concentric Cylinder Solvent Trap CoverA Solvent Trap is available for the Peltier Concentric Cylinder. It includes a base reservoir anda two-piece cover that is mounted to the shaft of the rotor. The Solvent Trap provides a vaporbarrier to seal the environment inside the cup and prevents solvent evaporation.Two-Piece CoverBase ReservoirCupRotorFluid in ReservoirSampleCharacterization of Foam with Vane RotorThe figures below show an example of the time and frequency dependent response of a foam shaving cream characterized using a standard cup and vane geometry. The structure of shaving foam has alimited lifetime, or limited stability. The vane geometry minimizes shearing stress that occurs during loading in the gap with standard rotor, keeping the delicate foam structure intact for testing. A wide rangeof structural information can be captured very quickly using multiwave characterization on the DHR. The figure to the left shows a decay in storage modulus G’ as the structure of the foam breaks down withincreasing time. Using the multiwave, the data are simultaneously collected over a wide range of frequencies. The data can be plotted as frequency sweeps at increasing time, as shown on the right. Thesedata show the time dependent viscoelastic response of the shaving foam.Multiwave time sweepFrequency Sweeps on Foam at Different Time Intervals450.01 min20 min40 min60 minG’ (Pa)10 210 3 10 -1 10 0 10 1400.0350.0300.0G’ (Pa)250.0200.0150.0100.050.000f = 0.1 Hzf = 0.2 Hzf = 0.4 Hzf = 0.8 Hzf = 1.6 Hzf = 3.2 Hzf = 6.4 Hzf = 10 Hz0 10.0 20.0 30.0 40.0 50.0 60.0 70.0time (min)f (Hz)Concentric Cylinder17