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Rheology is the study of flow and deformation of materials under applied forces which is routinely measured using a rheometer. 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 as well as asphalt. 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 and product performance. The type of rheometer required for measuring these properties is often dependent on the relevant shear rates and timescales as well as sample size and viscosity. Examples of rheological measurements include:

  • Viscosity profiling for non-Newtonian shear-dependent behavior to simulate processing or in-use conditions.
  • Viscoelastic fingerprinting for material classification to determine extent of solid-like or liquid-like behavior.
  • Optimising and assessing 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.
  • Pre-formulation screening for therapeutics, particularly biopharmaceuticals.

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Rheology masterclass 1 - The basic of viscosity Webinar - Live (English)

Rheology is defined as the science of deformation and flow and in particular refers to materials that show viscoelastic or non-Newtonian behaviour when stressed. Such materials include suspensions, emulsions, polymer solutions and foams to name but a...

Product:
Kinexus lab+,Kinexus pro+,Kinexus ultra+
Date:
March 31 2015
Language:
English

Keywords: English Kinexus pro+ Kinexus ultra+ Rheology and viscosity Rheometry - rotational Webinar - Live Eastern Time Kinexus lab+ 

Rheological characterisation of dispersed systems with novel geometries Webinar - Live (English)

In this webinar will be discussing the use of the flexible gapping system of Kinexus to allow the use of a range of novel geometries to measure otherwise difficult to characterise disperse systems. Comparisons will be made on model systems, a zero-sh...

Product:
Kinexus lab+,Kinexus pro+,Kinexus ultra+
Date:
March 17 2015
Language:
English

Keywords: English Kinexus pro+ Kinexus ultra+ Rheology and viscosity Rheometry - rotational Webinar - Live Eastern Time Kinexus lab+ 

Ten rotational rheometry questions you may have but don’t know who to ask! Webinar - Recorded (English)

If you’ve got a rotational rheometer question and don’t know who to ask then this webinar is for you!  Our very own rheology guru Chuck Rohn will be answering ten of the most common questions he has been asked over his long career in the field of rh...

Product:
Kinexus lab+,Kinexus pro+,Kinexus ultra+
Date recorded:
February 24 2015
Language:
English

Keywords: English Kinexus pro+ Kinexus ultra+ Rheology and viscosity Webinar - Recorded Eastern Time Kinexus lab+ 

Characterizing Opthalmic Viscosurgical Devices (OVDs) using a rotational rheometer Application Note (English)

This application note discusses the methodology and results for the rheological characterization of Opthalmic Viscosurgical Devices (OVDs) according to the International Standard ISO15798:2013


Keywords: Polymer solutions English Application Note Kinexus range Rheology and viscosity Rheometry - rotational Polysaccharides Pharmaceutical formulation and development Ophthalmic 

Analytical strategies for inkjet formulation – A customer perspective Webinar - Recorded (English)

Analytical systems from Malvern Instruments are now used routinely to advance inkjet formulation at Domino Printing Sciences plc in the UK, one of the world’s leading printing technology companies. Domino are best known for printing “sell-by” dates o...

Date recorded:
February 12 2015
Language:
English

Keywords: English Rheology and viscosity Dynamic Light Scattering Gel Permeation Chromatography Paints, inks and coatings Webinar - Recorded Eastern Time 
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Rheological characterisation of dispersed systems with novel geometries
(March 17 2015)

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