Dynamic Mechanical Analysis (DMA) is a testing technique and related analytical instrument that measures the physical properties of solids and polymer melts, reports modulus and damping, and is programmable to measure force, stress, strain, frequency and temperature.
What can DMA do?
Dynamic mechanical analysis (abbreviated DMA) is a technique used to study and characterize materials. It is most useful for studying the viscoelastic behavior of polymers. A sinusoidal stress is applied and the strain in the material is measured, allowing one to determine the complex modulus.
Does DMA measure viscosity?
To do so, DMA instrument applies an oscillating force to a material and measures its response; from such experiments, the viscosity (the tendency to flow) and stiffness of the sample can be calculated. These viscoelastic properties can be related to temperature, time, or frequency.21 Mar 2021
How does a DMA machine work?
A DMA works by applying a sinusoidal deformation to a sample of known geometry. The sample can be subjected by a controlled stress or a controlled strain. For a known stress, the sample will then deform a certain amount. In DMA this is done sinusoidally.
Is DMA destructive?
DMA is a frequency response analysis that uses a constant, non-destructive oscillatory strain (or stress) at selected frequencies and temperatures while recording the resulting stress (or strain) response of the sample material [2].
What does dynamic mechanical analysis measure?
Dynamic Mechanical Analysis (DMA) is a technique that is widely used to characterize a material's properties as a function of temperature, time, frequency, stress, atmosphere or a combination of these parameters.
Can dynamic mechanical analysis measure viscosity?
Dynamic mechanical analysis (DMA) is a basic tool for the characterization of viscoelastic materials, particularly polymers. Applying an oscillatory force to a material, its response can be measured, calculating the viscosity and the stiffness related to temperature, time, or frequency.
What does higher storage modulus mean?
higher energy storage capability
What is a DMA machine?
A Dynamic Mechanical Analysis, otherwise known as DMA, is a technique where. a small deformation is applied to a sample in a cyclic manner. This allows the materials response to stress, temperature, frequency and other values to be studied. The term is also used to refer to the analyzer that performs the test.