Skip to left navigation

Skip to page content

Find us on...

Rotational rheometry is a powerful technique for the measurement of complex shear rheology across all material types – sensitive enough to measure the viscosity of dilute polymer solutions, and yet robust enough to measure the viscoelasticity of high modulus polymers or composites. Rotational rheometry is ideal for discerning structural and compositional changes of materials, which can be critical controlling factors in flow and deformation properties, and ultimately product stability and performance.

The basics of the rotational rheometry technique are as follows:

  • The sample is loaded into the gap of a measuring system, or geometry – such as a cone and plate or a concentric cylinder system – specifically designed to impose simple shear flow when rotated.
  • The measuring system is supported by a virtually frictionless air-bearing, and driven by an ultra-low inertia motor, coupled to an ultra-high precision position encoder. The sample and measuring system are also temperature controlled.
  • Various rheological characteristics of the sample can be determined by rotating, oscillating or applying a step function to the measuring system – either by controlling motor torque (stress controlled rheometry) or position change (strain controlled rheometry).
  • Common test modes are rotational (or flow) to measure shear viscosity, and oscillation to measure dynamic material properties such as viscoelastic modulus and phase angle.

Rotational rheometry also enables other rheological properties to be evaluated, including yield stress, thixotropy, creep and recovery and stress relaxation.

Related products

Kinexus range Next generation rheometer redefines ease of use Image
Measurement
Rheology and viscosity
Torque range
0.5nNm to 250mNm
Temperature range
-40°C to 200°C
Technology
Rheometry - rotational
More information
DSR Industry standard Asphalt binder grade testing Image
Measurement
Rheology and viscosity
Temperature range
5°C to 95°C
Torque range
0.01mNm to 10mNm
Technology
Rheometry - rotational
More information
 
 

Resource center search

Free access to exclusive content including webinars, presentations, application notes, technical notes, whitepapers and more. Enter your search term in the box and use the drop down boxes to filter the results.

Reset filters
Items shown: 5, 10, 20, ALL
Sort by: Date or Alphabetical
Previous page Showing results 1 - 5 of 55 Next page
Polymer solution characterization – Part 4 Webinar - Recorded (English)

Polymeric materials are the most studied of all rheological materials and polymeric solutions in particular are perhaps the most interesting. They are ubiquitous in every-day life and play an important role in applications ranging from joint lubricat...

Product:
Zetasizer Nano ZS,Kinexus range,Rosand range,Zetasizer Nano ZSP,m-VROCi
Date recorded:
September 16 2014
Language:
English

Keywords: Polymer solutions English Kinexus range Rosand range Rheology and viscosity Dynamic Light Scattering Rheometry - capillary Rheometry - rotational Polymers, plastics and rubbers Paints, inks and coatings Food additives Webinar - Recorded Eastern Time Zetasizer Nano ZS Zetasizer Nano ZSP Microrheology m-VROCi Rheometry - microfluidic flow 

Quantifying viscosity recovery following extrusion or spraying using thixotropy assessment on a rotational rheometer Application Note (English)

This app note shows how a three step shear rate test can be used to evaluate the extent of viscosity recovery following extrusion from a tube or bottle.


Keywords: English Application Note Kinexus range Rheology and viscosity Rheometry - rotational 

Quantifying shear thinning behavior on a rotational rheometer using the power law model Application Note (English)

This application note shows how the power law model can be used to quantify shear thinning behavior and for comparing between products and formulations.


Keywords: English Application Note Kinexus range Rheology and viscosity Rheometry - rotational 

Monitoring structure rebuild (thixotropy) following extrusion from a bottle, tube or spray head Application Note (English)

This application note shows how a three-step strain/shear rate test can be used to evaluate the rate and extent of elasticity recovery following extrusion from a tube. 


Keywords: English Application Note Kinexus range Rheology and viscosity Rheometry - rotational 

Evaluating product spreading characteristics on a rotational rheometer using the power law model Application Note (English)

This application note shows how a shear rate ramp test with a power law model fit can be used to characterize the spread-ability of various commercial products using the power law fitting parameters k and n.


Keywords: English Application Note Kinexus range Rheology and viscosity Rheometry - rotational 
Previous page Showing results 1 - 5 of 55 Next page

Glossary

Contact sales Register now

Rheology Rocks spotlight

View webinar