QVis viscosimeter is an oscillating quartz which is robust and versatile: with its wear-free crystal QVis can determine the dynamic viscosity of both resting and flowing liquids. Being fully independent of the flow conditions, your liquid can even have turbulences.
|Method||Dynamic wave spectroscopy (DWS)|
|Sample preparation||No sample preparation required,|
|No of samples||6 at a time|
Rheolaser Master is based on optical measurement by MS-DWS. The complexity of polymers and their compounds is a subject to continuous developments. To study these developments this measuring technology is used. Rheolaser was developed for performing passive Microrheology analysis for soft material.
For characterizing viscoelastic fluids, user can plot the viscous and elastic modulus at a chosen frequency (1 Hz for instance) or versus frequencies
This method is also used for analysis of the microstructure like mesh size and relaxation time
Multiple experiments can be performed with the same sample versus time, as it is a non destructive method
Evolution of G’µR, G’’µR, TR µR versus time
Measurement of the perfect gel point by plotting G’’µR /G’µR at several frequencies versus time
Evolution of the polymer mesh size versus time
Evolution of the viscoelastic properties versus the pH, temperature
Structure recovery / thixotropy:
After shearing, automatic plot of G’µR ,G’’µR at rest versus time at a one or several frequencies
Relaxation time TR UR kinetic
|Temp||-10 degC to 100degC|
|Pressure||0 to 35 bar|
|Line dia||3mm, 5mm|
|sample volume||0.5L to 3L|
|Minimum Order Quantity||1 Piece|
|Maximum Viscosity Range||200000 cP|
The method uses a micro fluidic chip, made of PP or glass and simply flow just few µL or ml test sample along with the reference, the instruments takes the pictures of the flow in the chip and provides direct info on viscosity or stress rheology ( up to 10exp5 /sec) in just few seconds. These chips do not require any calibration and can be cleaned for reuse or disposable.