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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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Polymer solution characterization – Part 4 Webinar - Live (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 jo...

Date:
September 16 2014
Language:
English

Keywords: English Rheology and viscosity Rheometry - capillary Rheometry - rotational Polymers, plastics and rubbers Webinar - Live Eastern Time Microrheology Rheometry - microfluidic flow 

How to characterize and optimize inkjet inks - Part 1 Webinar - Live (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 prod...

Date:
September 9 2014
Language:
English

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

Using rheology to Measure the gelation of proteins Webinar - Live (English)

Sol-gel transitions of proteins can be determined by measuring the kinetics of their viscoelastic material functions. For gelatin, the gel time is a strong function of temperature and the fraction of the helix content of the protein chain...

Date:
September 11 2014
Language:
English

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

Applications of rheology in the waxes, creams and emulsions arena Webinar - Recorded (English)

In this webinar we are considering materials that we’d typically measure at room temperature or perhaps a little bit above or below. However there are always exceptions and we are giving a flavor of the applications and use of rheology (c...

Date recorded:
August 12 2014
Language:
English

Keywords: English Rheology and viscosity Consumer products Food and drinks Specialty chemicals Webinar - Recorded Eastern Time 

An introduction to capillary rheometry - Evaluating material properties under process relevant conditions Webinar - Live (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 rheolog...

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

Keywords: English Rosand range Rheology and viscosity Rheometry - capillary Polymers, plastics and rubbers Webinar - Live Eastern Time 
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An introduction to capillary rheometry - Evaluating material properties under process relevant conditions
(August 28 2014)

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