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Rheology is the study of flow and deformation of materials under applied forces. The measurement of rheological properties is applicable to all materials – from fluids such as dilute solutions of polymers and surfactants through to concentrated protein formulations, to semi-solids such as pastes and creams, to molten or solid polymers. Rheological properties can be measured from bulk sample deformation using a mechanical rheometer, or on a micro-scale by using a microcapillary viscometer or an optical technique such as Microrheology.

Many commonly-used materials and formulations exhibit complex rheological properties, whose viscosity and viscoelasticity can vary depending upon the external conditions applied, such as stress, strain, timescale and temperature. Internal sample variations such as protein concentration and stability, and formulation type for biopharmaceuticals, are also key factors that determine rheological properties.

Rheological properties impact at all stages of material use across multiple industries – from formulation development and stability to processing to product performance. Examples of rheological measurements include:

  • Viscosity profiling for non-Newtonian shear-dependent behavior to simulate processing or use conditions.
  • Viscoelastic fingerprinting for material classification to determine extent of solid-like or liquid-like behavior.
  • Optimising dispersion stability.
  • Determination of thixotropy of paints and coatings for product application and final finish quality.
  • Impact of molecular architecture of polymers on viscoelasticity for processing and end-use performance.
  • Benchmarking Food and Personal Care products for ability to pump or spread.
  • Full cure profiling for bonding or gelling systems.
  • Preformulation screening for therapeutics, particularly biopharmaceuticals.

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How to characterize and optimize inkjet inks - Part 1 Webinar - Recorded (English)

Inkjet technology and the printing flexibility it offers is enabling a rapid growth in industrial and commercial inkjet printing. Modern inkjet print heads can be designed and configured to print on many different substrates, and can produce function...

Date recorded:
October 8 2014
Language:
English

Keywords: English Particle size Rheology and viscosity Paints, inks and coatings Webinar - Recorded Eastern Time 

How to characterize and optimize inkjet inks Part 2 Webinar - Live (English)

Achieving product stability is a critical aspect of ink formulation. Modern inks are typically colloidal suspensions of multiple components in an organic or aqueous continuous phase. The functionality of the finished product relies on maintaining sus...

Date:
October 21 2014
Language:
English

Keywords: English Rheology and viscosity Zeta potential Pigments and toners Paints, inks and coatings Webinar - Live Eastern Time 

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 

Using rheology to measure the gelation of proteins Webinar - Recorded (English)

Proteins are complex amphiphilic molecules that can take up different configurations depending on their structure and environment. This can lead to aggregation and gelation which may or may not be favorable depending on the application. I...

Date recorded:
September 11 2014
Language:
English

Keywords: English Rheology and viscosity Food and drinks Webinar - Recorded Eastern Time Biopharmaceutical development 

An introduction to capillary rheometry - Evaluating material properties under process relevant conditions Webinar - Recorded (English)

Capillary rheometry has its origins in polymer melt processing, but is also directly relevant to many other material processes such as high speed coating, suspension processing, and printing applications. The technique enables key rheological...

Product:
Rosand range
Date recorded:
August 28 2014
Language:
English

Keywords: English Rosand range Rheology and viscosity Rheometry - capillary Polymers, plastics and rubbers Webinar - Recorded Eastern Time 
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How to characterize and optimize inkjet inks Part 2
(October 21 2014)

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