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TGA measures weight loss as a function of temperature in a controlled environment. The sample is weighed at room temperature before testing, and then the mass is monitored for changes as an increasing amount of heat is applied to the sample.
The analysis plots the temperature at which each of the components volatilizes. Because TGA identifies multiple points of weight loss, this technique can screen for additives, moisture and filler content within the polymer. It’s also commonly used to test the thermal stability in both solids and liquids.
TMA evaluates physical dimensions, mass, volume, and density change as a function of temperature, time, and applied force. Depending on the testing requirements, the force may change or be constant during the test. Additionally, the temperature regime may be predetermined or based on a feedback signal from the sample.
TMA is one of the most common techniques for measuring dimensional changes and solid and liquid materials, such as the coefficient of thermal expansion. It can also determine a material’s softening point, glass transition temperature, shrinkage, and physical changes due to age.
Do you want to understand how a material’s physical properties change based on temperature? Thermomechanical analysis (TMA) can provide the answers.
Are you looking for an option for measuring insulation resistance properties of a material? Dielectric analysis (DEA) might be the answer.
DEA is similar to DMA – both analyses subject a substance to a sinusoidal shear strain to quantify deformation resistance under vibratory conditions. The difference is that DEA uses an oscillating electrical field, whereas DMA uses mechanical force.
DEA is used to measure insulative properties and identity changes in viscosity and cure states. It is especially effective at measuring invisible in-mold curing necessary for quality components. This technique is frequently used on materials such as resins, paints and adhesives both in the laboratory and in the manufacturing process.
