Is the measure of the defined viscosity relevant? The answer to this question raises other questions:
In the field of polymers, there are other viscosity values such as specific viscosity, intrinsic viscosity, and relative viscosity, which make it possible to calculate the average viscous molar mass of these polymers in solutionĢ. s (1 mPa.s = 20☌ water viscosity) or Poise or cPoise. It can consider the rheological behavior of the product, which gives it an absolute character. Dynamic viscosity h (Eta) qualifies most formulated products it is free from the effect of density and is most measured with rotary instruments.
It is expressed in Stokes, cStokes or cm2/s. Kinematic viscosity n (nu), resulting from a flow time measurement, takes account of gravity and concerns rather less viscous fluids and simple rheological behavior: Newtonian fluids.
