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In this article we explain the importance of a stable MFI and how this can be done automatically.
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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.
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Increase the amount of recycled material that can be used without impacting material quality
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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.
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Understand how to increase the amount of recycled material that can be used without impacting material quality
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Who in the Lab is ready to stop cutting prep-stock samples with scissors & shears by hand?
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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?
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Providing automated access to pressure and temperature readings from your extrusion line makes complete sense to any polymer transforming operation.
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How to properly charge the barrel before starting a test in LCR capillary rheometer
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The following instructions will assist with the installation of LABKARS software (version 3.92) on Windows 10 operating systems.
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Dynisco online rheometers can be easily installed in variety of extrusion lines and continuously measure the intrinsic viscosity parameters of the extrudates during an extrusion process.
Learn MoreThe following instructions will resolve the key violation error that appears in Labkars software, which is used to control our LCR7000 series capillary rheometers
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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
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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
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In this blog our Rheological Scientist, Azadeh Farahanchi Ph.D. discusses how to understand plastic shear thinning behavior using a melt indexer
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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
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This blog talks about the various methods (Method A and B) and their differences in measuring the melt flow rate of plastic material
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Die swell has been used as a qualitative measure of polymer melt elasticity for quality control purposes in plastics industry. Die swell also can be used for analysis of extrudate smoothness in an extrusion process.
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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
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Capillary rheometers are one of the most common types of analytical devices, used to analyze the flow properties of viscoelastic polymer materials under processing conditions. The Dynisco LCR7001 can utilize both load cell and pressure transducer simultaneously in order to produce information on both the force applied to the polymer sample and the resulting pressure at the die entrance.
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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
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Gain an understanding about the selection of capillary rheometer dies that Dynisco produces for various applications.
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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.
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Creating a flowing material can be measured in grams per ten minutes (per the ASTM D1238/ISO 1133) providing vital material properties.
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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.
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