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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
05.21.18
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
03.02.18
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
01.14.19
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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
09.09.19
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
07.16.18
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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
03.29.19
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
03.01.18
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
10.02.18
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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
11.15.19
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
07.30.19
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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
07.09.19
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