Rheology of Polymers

Rheology laboratory testing of polymers to determine the rheological (flow) properties of materials, gels and pastes, to optimise processing and properties

Polymer rheology testing is the study of how the stress in a material or force applied is related to deformation and flow of the material. 

Understanding the rheological properties of polymers through laboratory testing can help to optimize products and process conditions, thereby saving costs and minimizing potential waste. 

Our polymer science experts perform rheological property testing on a wide range of polymers such as polyolefins, liquids, adhesives, gels and pastes using a wide range of temperatures and deformation rates (both shear and extensional).  Rheology tests are performed while the polymer is in the melt phase or while the polymer has been dissolved in a solvent for intrinsic viscosity and relative viscosity.

We can apply our rheology test capabilities in diagnostics, design or optimisation problems, using quantitative polymer rheology measurements to help you to optimise processing with minimal product degradation, or to optimise molding parameters which can lead to greater cost efficiencies costs and enhanced production rates.

The rheology data we generate and the insight we can bring to your development process can help ensure that the polymer’s properties meet specifications for the end use (texture, product pour) and product quality: surface distortions, anisotropy, strength, structure development.

Polymer rheological testing and analysis:
  • Rotational Rheology Laboratory Stress and strain rate control options  are available in air or an inert atmosphere suitable for polymer melts, viscous fluids, dispersions, emulsions and other materials, from ambient temperatures up to 400°C
  • Capillary Rheometry Providing data for design packages. Thermal stability, onset of unstable flow, and wall slip measurements. Measurement of transient extensional properties as a tool to predict/troubleshoot  polymer flow  behaviour in many common forming processes such as extrusion, blow moulding and injection moulding.
  • Melt Flow Rate and Melt Flow Index (ASTM D1238, ASTM D3364, ISO 1133)
  • Dilute Solution Viscosity Measurements (ASTM D1243, ASTM 2857, ASTM D4603, ISO 489)

Our polymer scientists collectively possess many years’ experience in the characterisation of these challenging materials. Our rheology labs are located in Europe and North America, and we routinely work with some of the most innovative organisations from around the world.

Working across diverse industries such as automotive, aerospace, medical devices, industrial production and stakeholders in the polymer supply chain we deliver a detailed understanding of rheological properties through laboratory testing, helping you to optimize products and process conditions.

 
Traditional Ziegler-Natta (ZN) catalysts have multiple active sites which tend to result in polymers having relatively broad molecular weight distributions. Mettalocene catalysts, on the other hand produce polyolefins with simply defined and well controlled molecular weight distributions which tend to be narrower in MWD than those produced from ZN catalysts.
 
Need help or have a question? +1 413 499 0983
 

Need help or have a question?

+1 413 499 0983
Wilton UK:
+44 1642 435 788
Benelux:
+31 88 126 8888
France:
+33 (0) 385 99 12 80
APAC:
+65 6805 4800
Germany:
0800 5855888
+49 711 27311 152
Switzerland:
+41 61 686 4800
Mexico:
01 800 5468 3783
+52 55 5091 2150
Brazil:
+55 11 2322 8033
Australia:
+61 1300 046 837
India:
+91 (22) 4245 0204