The Kinexus rheometer design has been underpinned with the market-defining strengths of the previous generation Bohlin rheometers, coupled with advances in shear and vertical (axial) testing, to deliver a rotational rheometer platform with unprecedented dual-action capabilities.
Kinexus, Rheological and Viscosity, Tech Talk »
Why measure a viscosity flow curve, rather than just give a number?
Very often chemists are asked to provide a single viscosity value for a product or formulation without much information about the required conditions of the measurement. For an oil or low viscosity liquid which is Newtonian this is pretty straightforward, so long as your viscometer is properly calibrated and the measurement temperature is provided. However, most industrially interesting or complex fluids such as polymer solutions, suspensions and emulsions are non-Newtonian, meaning that their viscosity varies with shear rate – …Read the full story »
Peeling back the foil on a gold coin. Popping a perforated window on a festive calendar. Pursuing your favourite coloured wrapper around a bowl. The prize inside many little packages we open this season will be chocolate.
The secret of chocolate’s almost universal appeal is in the mouthfeel the “snap” of the first bite, how the chocolate melts and how it coats the inside of the mouth. Despite being a consumer experience, mouthfeel is strongly related to materials science – chocolate being a complex composite material.
Our instruments hold the key to many of …
Kinexus, Rheological and Viscosity »
It is time to pop on my curly false moustache and chef’s hat to become high, mighty and judgmental about what has been bothering me lately: the ‘not so’ culinary delights on the rheology road….
I travel – a lot! On my travels, I experience a variety of ‘on-the-go’ foods and hotel restaurant experiences. Since I am a rheology specialist and food science and texture ultimately encompasses the science of rheology, I have a tendency to overanalyze everything I eat.
Sauces, custards, creams and gravies… viscosity and consistency…it bothers me! We’ve all …Read the full story »
Asphalt Expert Task Group Meeting
The Federal Highway Administration (FHWA) Expert Task Groups (ETGs) on Asphalt Mixtures and Binder Technology is organizing meetings on September, 12-15, 2016.
The upcoming meetings will take place at the University of Mass Dartmouth Campus outside of Falls River, MA – USA.
The purpose of Expert Task Groups (ETG) is to coordinate, develop, and improve national guidance and recommendations for the improvement of asphalt pavement mixtures and asphalt binders.
These groups provide feedback as well as encourage correct utilization and improvement of state-of-the-practice solutions. They also represent all aspects of …
Kinexus, Meet the Experts »
Apologies for not posting sooner, but recently I have had the privilege of visiting some of our customers, covering for a service engineer who is temporarily out of action.
It is hard work, but it has also been a timely reminder of everything that goes into making sure our instruments are working properly and delivering the correct results.
I have been calibrating and installing Kinexus rheometers (and servicing the previous generation of Bohlin rheometers) for the most part, and each of these visits can take several hours to run through the various …
Finally! After what has felt like one of the wettest and longest winters in memory here in the UK, we’re now heading into the long, mellow days of midsummer.
But casting its miserable shadow over the barbecues, school holidays and paddling pools is the dreaded allergy season. As one of the downsides of life in our “green and pleasant land”, during June we are hit hard by the combined impact of pollen from trees, grasses and weeds.
Many of us are now taking a daily antihistamine of some sort, and others …
Over the last few years, the nail polish industry has really opened up its beauty box of tricks, and on the market today, to name but a few, we see nail polishes with “magnetic, gel, matte, glitter, crackle, stamping, quick-dry, caviar, sponge, color changing, leather and sandy” effects. There are also nail polishes with kale, silk and nylon extracts! It really has turned into an art form. However, in order for us to appreciate the wonders of these magical nail polishes, there must be some exciting science behind it all?
Kinexus, Rheological and Viscosity »
Rheological – geological – but not mythological…
Pluto (not the Disney character – that’s another story) is a word that provokes emotion and comment. This ‘Planet X’ discovered in 1930 by a young graduate student Clyde Tombaugh, never fails to excite the science in all of us.
Demoting Pluto as a ‘real’ planet to a ‘dwarf’ planet a few years back attracted controversy with a huge public outcry and input for and against – the case for demotion was made mainly by a small bunch of political astronomers, it has to be said, so you can …
Polymer solution rheology to protein aggregation – Following Sir G.I. Taylor
In a very fortuitous way indeed, from my academic research at Bristol University through to my work here at Malvern, I have managed to maintain a connection with the brilliant work of Sir Geoffrey Ingram Taylor (1886-1975) – who has quite rightly been described as ‘one of the most notable scientists of the 20th century’ . It’s quite probable that many workers will have come across some important contribution from Taylor in their line of research, but may not realize that …
Kinexus, Meet the Experts »
Last week, I was reviewing some content that my rheology colleagues had published on the Malvern website relating to the axial capabilities of our Kinexus rheometer. This was of interest since it complimented some published work I was sent by one of our Kinexus users, as well as a new BBC gameshow I happened to come across. I’ll explain a bit more!
In a recent blog, entitled “Kinexus, more than just a rheometer!” my colleague John Duffy talked about the advanced features of our Kinexus rheometers such as the ability to …
Archimedes - Particle Metrology System, Insitec, Kinexus, Meet the Experts, Molecular structure, Molecular weight, Particle size, Rheometry - Rotational »
Last week my kids got very frustrated with warm French toast and a new brand of chocolate spread. The French toast, was …of course…warm, and the chocolate was misbehaving: melting and dripping on their fingers …
Now, French toast (and chocolate spread) is a staple at our house but somehow this never happened before. Mom learned the lesson fast: for this new chocolate spread let the French toast cool first! But the little neurons started firing (wonder… I know, but it happens sometimes)…
Little questions and answers in my head: why now? – …
There is often a necessity to measure, or at least estimate, true viscosity values using non-standard measuring systems on a rotational rheometer. This may be to replicate a mixing or manufacturing process on a lab scale, to keep a sample dispersed and uniform during a measurement or to measure some rheological property that would be difficult or impossible with a standard configuration such as ‘cone and plate’ or ‘concentric cylinders’.
While non-standard measuring systems can be used on our Kinexus rotational rheometers (such as custom made systems attached via our universal …
Inside Malvern, Kinexus, Laser Diffraction, Mastersizer, Particle size, Rheological and Viscosity, Rheometry - Rotational »
My name is Thea Miksch and I recently visited Malvern Instruments for a six day work experience placement. It was quite a big thing for me since I came from Germany to the UK for this placement. I was a little scared that I wouldn’t understand anything about the technology, but the Malvern employees were great at explaining it so even I got it!
One of the many things I learned is that there is science behind everything. I never thought of the particle size of chocolate or the viscosity of …
Kinexus, Laser Diffraction, Mastersizer, Particle size, Rheological and Viscosity, Rheometry - Rotational »
Nutri Ninja Pro Vs the Nutribullet
Smoothie Wars! Which blends the best?
Here at Malvern Instruments, we seem to enjoy testing the rheological properties of drinks, particularly those of the alcoholic variety! Just before Christmas John Duffy and Steve Carrington looked into the differences between traditional ales and more recently they explored the properties of Guinness. Any excuse to go down the pub…!
Therefore, it was probably about time to explore the healthier option on the drinks menu, and an ideal hangover cure – smoothies. Additionally this was a perfect opportunity to demonstrate …
Microfluidic Rheometer and Guinness
The Great Guinness Viscosity Challenge
Last year we did a nice Christmas blog on the viscosity of beer where myself and Steve Carrington took our Microfluidic rheometer down to our local pub to measure a selection of their traditional ales and correlate the results with drinking experience of course. Since then I have been asked a number of times what is the viscosity of the ‘good old black stuff’ otherwise known as Guinness. I am not sure whether my colleagues think I have an extremely sensitive and well …
Kinexus, Laser Diffraction, Malvern Events, Mastersizer, Meet the Experts, Particle size, Rheological and Viscosity, Rheometry - Rotational »
Coffee and Cocoa Particle Size
Chocolate and coffee, what a great combination! But which do you prefer – milk chocolate and a regular cup of coffee or perhaps an espresso with a square of dark chocolate? Milk chocolate and dark chocolate have different compositions and would be expected to taste differently but why does an espresso taste different from a regular cup of coffee if they are made from the same beans? Are there any similarities between coffee flavor and chocolate flavor?
The taste of the coffee we drink depends very much on …
A rotational rheometer is required to enable a complete understanding of material flow and deformation behaviour for complex viscoelastic materials – from low viscosity polymer and surfactant solutions, through to suspensions and emulsions and high particle-loaded semi-solids such as pastes, and high viscosity polymer melts.
Such material types are commonly encountered across a wide variety of industries from personal care and cosmetics, paints and coatings, foods and polymer products, and it is often the material’s elasticity component that will strongly influence their processing and application behaviour.
Knowing a rheometer can help you …
Corporate, Customer experience, Kinexus »
Thinking back to those early design meetings that the development team here at Malvern undertook at the inception of the Kinexus rheometer project, one of our key aims was to deliver a new rheometer platform that enabled total flexibility of control – to provide unique test capabilities that went beyond those previously available on rotational rheometer systems.
Market feedback was telling us that Industrial users would like the option to run under Standard Operating Procedure (SOP)-driven protocols, with ‘locked down’ tests that included specific user instructions and inputs to meet their …
Corporate, Kinexus, Meet the Experts »
As one of the rheologists here at Malvern, I thought you would like to know about one of the slightly unusual questions I was asked recently by a customer: ‘What is the sign of a good rheologist?’
Maybe my initial answer wasn’t the one that the customer expected, but it made me smile……it’s the rheologist’s “badge of honour”, also known as how a rheologist earns their stripes! This is a true sign of a practical rheologist, although technology (for the better) is starting to make this less apparent.
To explain, we need to …
Corporate, Kinexus, Particle shape, Particle size, Zeta potential »
My role as Product Technical Specialist for the range of rheology products at Malvern takes me all across the globe supporting our customers, and I’ve just come to the end of a ‘rheology tour’ of all the states in Australia… it’s definitely a big country! I’d particularly like thank all the representatives from our local distributor, ATA Scientific, for helping out at each of the seminars.
Part of our seminars down under were focused on promoting the advantages of rheology, and judging by the number of viscometer users attending our talks, …