ASTM D2196 Standard Test Methods for Rheological Properties of Non-Newtonian Materials by Rotational Viscometer
ASTM D2196 is a standardised method to determine the apparent viscosity of a non-Newtonian material like a coating, adhesive, or paste, as well as shear thinning and thixotropy. These are determined by a rotational viscometer at a shear rate of 0.1-50 s-1, usually in a 600 mL glass beaker. The standard has three primary test procedures to define the behavior of the material under different shear conditions.
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Introduction to ASTM D2196
ASTM D2196 is applied in the investigation of the flow characteristics of substances whose viscosity is not constant (non-Newtonian). It is particularly applicable in industries involved in paints, coatings, cosmetics, or food products, where the consistency of a product under movement or stagnation affects its usability. The test helps determine how materials react or respond to shear stresses, ensuring they are well formulated and perform as intended.
Get Certified ASTM D2196 for Uncompromising Quality and Project Success
ASTM D 2196 certification assists manufacturers in testing the rheological characteristics of non-Newtonian substances. Compliance guarantees that the products possess constant viscosity and flow properties throughout the production, storage, and use of the products. This increases the quality assurance and product reliability.
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ASTM D2196 Testing Procedures and Requirements
Test Method A
The apparent viscosity is measured at a constant speed using a rotational viscometer to determine the resistance to flow under a particular shear.
Test Methods B and C
These tests determine shear thinning and thixotropy. These tests involve step-wise variation in spindle speed and measure viscosity during ramp-up and ramp-down runs, as well as after high-shear treatment, which mimics real-life applications.
Scope of ASTM D2196
Rational viscometers measure the viscosity and rheological characteristics of non-Newtonian materials.
Gives the process of how to measure the viscosity under controlled shear rates.
has developed standards of reporting rheological data and test conditions.
ASTM D2196 Equipment and Sample Preparation
Sample Preparation
A sample is added to a 0.5-1 L flask, vigorously shaken, and allowed to settle for 10 min. Afterward, it is tested at 25 ± 0.5 °C. The transfer between containers is not permitted to maintain sample integrity.
Equipment
A rotational viscometer that allows easy replacement of spindles and accurate control of the speed, as well as standard Griffin beakers, is utilized.
Use of ASTM D2196
This test is widely employed in paints, coatings, cosmetics, pharmaceuticals, and construction materials.
It is also used in the control of quality and product development.
It is used by manufacturers to adjust formulations, ensuring the product is spread evenly and does not sag, while also restoring its structure after application
Common Challenges and Troubleshooting in ASTM D2196 Testing
Some of the issues that may arise are poor sample conditioning, improper equipment alignment, and irregular agitation. The presence of air bubbles, a temperature change, or the wrong selection of the spindle may bias results. The most important things to do to ensure the accuracy of the readings are to ensure proper shaking of the pre-test and maintain stable ambient conditions.
ASTM D2196 Aggregate Testing Method, Procedure, and Data Measuring
In this test, the sample is put in a rotational viscometer under a suitable spindle. The spindle turns at regulated rates, producing shear in the material and gauging the resistance to rotation. The resistance is measured as either viscosity or shear stress. Measures taken usually comprise the speed of the spindle, shear rate, viscosity figure, temperature, and test time.
Analysis Results and Interpretation for ASTM D2196
The findings comprise the apparent viscosity at specified speeds and the viscosity as it changes with time and with varying shear rates. The decrease in viscosity with a rise in speed implies shear thinning. An increase in the recovery ratio of viscosity indicates high thixotropy. This information assists in forecasting the flow of a material being applied and settling down.
Problem and the Solution of ASTM D2196
Problem: In production and use, the non-Newtonian materials can have unpredictable flow behavior.
Solution: ASTM D2196 offers a dependable means to quantify viscosity and rheology and allows the manufacturer of products to regulate the material performance and guarantee the quality of products.
Factors to Consider us to Test for ASTM D2196
Speed
Rotational viscometer testing is not very slow, and more than one shear rate test is possible to completely describe non-Newtonian behavior.
Expertise
To achieve the measurements of rheology, calibration of instruments and selection of the spindle, technicians should be aware of these items.
Cost
The cost of testing is average, and it includes the laboratory equipment, calibration, and sample preparation, but the outcomes are useful in sustaining product quality.
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Where can I get the astm d2196 tested?
You can share your astm d2196 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm d2196 test to various testing techniques.
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