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Capillary Dies in Capillary Rheometer

Gain an understanding about the selection of capillary rheometer dies that Dynisco produces for various applications. Learn More

By Azadeh Farahanchi, Rheological Scientist, Ph.D


Laboratory Mixing Extruder as Spinning Tool to Fibrillate Droplet Phase of Polymer Blend Systems

Nowadays, composites are ubiquitous in many parts of modern societies such as constructions, textiles, nonwovens, and automobile industry. In composites, interface plays a pivotal role in final mechanical properties. Learn More

By Roozbeh Hajiraissi


Correlation of Melt Viscosity of Polyethylene Terephthalate to Solution Intrinsic Viscosity

Polyethylene terephthalate (PET) is a hygroscopic resin from the polyester family which absorbs moisture onto their molecular structure when they are exposed to the ambient air. This has a huge effect on the flow behavior and rheological parameters of the plastic melt. Learn More

By Azadeh Farahanchi


Characterizing Thermal Stability of Polymer Melts Using a Capillary Rheometer

A thermal stability test can determine the resistance of a polymer melt to a change in the molecular structure at the test temperatures. The results of this test depend on the temperature, residence time at that temperature, material formulation, presence of moisture and/or contaminates Learn More

By Azadeh Farahanchi, Rheological Scientist, Ph.D


How to Prevent a Fluctuating MFI when Reprocessing / Extruding Used Plastic

In this article we explain the importance of a stable MFI and how this can be done automatically. Learn More

By Dynisco and Rokoma


PET and Polyolefin Recycling Inline Viscosity Measurement

Material analysis solutions range from the analysis of a polymer in the laboratory, to online quality control in production, to processing small quantities of special polymers or composites. Check out this Q & A blog to learn more about inline viscosity measurement in PET and polyolefin recycling. Learn More

By Heiker Fischer, PETplanet Insider and Johannes Lorenz


Extensional Viscosity – Rheological Significance of the Entrance Pressure Drop

Extensional/elongational viscosity measurements (melt strength) are of rheological importance in any plastic stretching process for example blow molding, sheet extrusion, blown film extrusion, fiber spinning, etc. as the plastic is constantly stretching or expanding in such processes. Learn More

By Azadeh Farahanchi, Rheological Scientist, Ph.D


Maintaining your Melt Flow Indexer

Learn More

By Jason Bradley, Regional Sales Manager


How Rheological Data from a Capillary Rheometer Can Help to Have a Better Metal Injection Molding (MIM) Process?

One of the key factors in any MIM process is the flow behavior of the feedstock during filling of of the mold. In order to have a defect free molding process (without jetting, short shot, sink mark, crack, etc.) with desired mechanical strength (tensile, flexural, failure stress, etc.) in the final products, understanding of the rheological properties of the binder and feedstock is necessary Learn More

By Azadeh Farahanchi, Rheological Scientist, Ph.D


Detecting Polymers in Material Products

It can be very difficult, if not impossible, to achieve complete indentification of most polymer products. However, in most cases, this is usually not needed; what is needed is the separation, or identification, of numerous molding materials whose identity has been lost, or an indication of the type of material used to create a component. Learn More

By Dynisco


Wall Slip Phenomena (Factors, Mechanism, and Calculation) in Capillary Rheometers

One of the common classical assumptions in rheological analysis, particularly in polymer melt flow in capillary rheometers, is no-slip boundary condition. Read more on why is it important to understand wall slippage when using a capillary rheometer for rheological analysis? Learn More

By Azadeh Farahanchi, Rheological Scientist, Ph.D


Correlation of ViscoIndicator Online Rheometer to a Laboratory Melt Flow Rate Tester

Online rheometers have been used increasingly in plastics processing and recycling industry to provide continuous data stream of rheological properties and real-time information on an extrusion process. This can beneficial for controlling of in-process product quality, reducing of waste stream, and increasing of process efficiency Learn More

By Azadeh Farahanchi, Rheological Scientist, Ph.D


Flow Curve Behavior of Polymer Melts

Flow curves of polymer melts (the graph of viscosity versus shear rate in the log-log scale) has two distinct behavior of Newtonian and Power law. At very low shear rates the Newtonian behavior dominates where the viscosity is independent of the shear rate and it approaches the value of η_0 which has been named as the zero-shear viscosity Learn More

By Azadeh Farahanchi, Rheological Scientist, Ph.D


Understanding the Shear Thinning Behavior of Thermoplastic Materials Using an Extrusion Plastometer (Melt Indexer)

In this blog our Rheological Scientist, Azadeh Farahanchi Ph.D. discusses how to understand plastic shear thinning behavior using a melt indexer Learn More

By Azadeh Farahanchi, Rheological Scientist, Ph.D


The Dynisco MiniGran: The Perfect Addition to your Quality Lab.

Who in the Lab is ready to stop cutting prep-stock samples with scissors & shears by hand? Learn More

By Jason Bradley, Regional Sales Manager


How to Measure Polymer`s Apparent Melt Density using a Melt Indexer

Method A/B is a test that can be performed in a melt flow rate tester in order to calculate the value of the polymer`s melt density at a specific temperature Learn More

By Azadeh Farahanchi, Rheological Scientist, Ph.D


Integrate Your Extrusion Line Data to Your Polymer Lab Data

Providing automated access to pressure and temperature readings from your extrusion line makes complete sense to any polymer transforming operation. Learn More

By Andres Blanco, Regional Sales Manager Latin America


The Dynisco PolyClean: The Safer and Faster Way to Clean Your Polymer Tooling

Our line of Fluidized Temperature Bath’s (FTB) liquid-like properties provide fast heat transfer to immersed tooling for immediate heating and burning off tough-to- clean polymers. Learn More

By Peter Duserick: Regional Sales Manager – Eastern US & Canada


Melt Flow Rate (MFR) above 1000g/10min

For melt flow rate testing above 1000g/10min, our LMI5000 and 5500 series melt flow indexers can utilize Procedure C testing with a "half-die" capillary to measure the melt flow rate of low viscosity polymers. Learn More

By Tee Teong Seng - Director of Asia-Pacific Sales


Barrel Charging Procedure Before Running the Test in LCR7001

How to properly charge the barrel before starting a test in LCR capillary rheometer Learn More

By Azadeh Farahanchi, Rheological Scientist, Ph.D


What is the Melt Flow Index?

Dive into the intricacies of the melt flow index (MFI), its significance in polymer science, and how Dynisco's advanced indexers optimize polymer processing. Learn More

By Dynisco Subject Matter Experts


Capillary Rheometer in Pharmaceutical Product Development

Dynisco recently helped a pharmaceutical company in the characterization of their new formulation product using our LCR7000 Capillary rheometer. Continue reading to find out more.... Learn More

By Ameet Deshmukh


What's the Difference Between Viscosity and Intrinsic Viscosity

Explore the differences between viscosity and intrinsic viscosity, crucial concepts in fluid dynamics, and their impact on scientific research Learn More

By Dynisco Subject Matter Experts


Have A Question? Ask a Dynisco expert for more information.

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  • Dynisco-Viatran Instrument Sdn Bhd

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    +605 6884014