#Viscosity chemistry plus#

Krebs spindle viscometer (KU meter) for paints, pigmented coatings, pastes and adhesives.High shear rate viscometer for paints and pigmented coatings, also known as an ICI viscometer.In this case, force is not measured, because kinematic viscosity is a measure of how fast the fluid moves under gravity.ĮAG Laboratories performs dynamic viscosity measurements using the following types of viscometers: Kinematic viscosity (also known as momentum diffusivity or flow time): measures the flowrate of the fluid as it moves over a stationary material under gravitational force.Dynamic shear viscosity: shear stress (force) is mechanically applied to the fluid, and the rate the fluid layer moves over a stationary material is measured.Viscosity can be measured using two different approaches: Want to learn more about measuring viscosity in your chemical products or our VROC technology? Register for our upcoming webinar to learn about extensive sample testing with VROC technology and the capabilities and specifications of our different viscometers.Viscosity is a measurement of a material’s resistance to flow, typically a fluid. The exceptions are with the industrial grade solvent of MEK, which was purchased from local hardware stores. As shown in the table above, the VROC data are in close agreement with the reference values of the CRC handbook (with differences within +/- 0.94% of the reference values). The standard deviation for our results was less than 0.005 cP, demonstrating excellent repeatability of our VROC viscometers. The table below compares the measured viscosities of various solvents with the reference values published in the CRC Handbook.

#Viscosity chemistry plus#

Our m-VROC ® and VROC ® initium one plus viscometers also have syringe jackets to help enclose the sample, preventing air interface, and help maintain temperature for temperature dependent studies. All VROC chips are fully enclosed in its own chip housing to prevent any air interface. VROC ® viscometers are enclosed instruments, meaning there is no fluid-air interface that can impact the measurement.

To minimize evaporation while testing with rheometers, researchers have created various fixtures, which are often cumbersome or require significant time to stabilize.

Solvent evaporation changes the effective sample volume and causes temperature variation, which influences viscosity measurements. Viscosity measurements also help maintain consistency of your end products and formulations, which minimizes the chances of late stage development rejections of your products.Īccurate viscosity measurement of volatile compounds can be challenging with conventional rheometers ― the sample-air interface is always a source of solvent evaporation. Viscosity measurements help to ensure consistency of raw materials and helps determine the behavior of various materials, even volatile chemicals, in the real world. When working with chemical products, viscosity measurements are essential in formulation, production/ manufacturing, and quality control. Viscosity is one of the major parameters used to characterize and determine the behavior of various materials. The quality of your materials can affect your development and production processes down the line or may even have an effect right away.

Understanding the ins and outs of your samples is imperative to your work and viscosity can be a key player in material characterization. Are you working with chemicals and material characterization where rheological properties of your samples are a must?