Dear all,
I have done a dynamic test on elastomer Agulus materials used for 3D printing to investigate the mechanical properties of this material, for instance, Storage and loss modulus, but the result is showing that the loss modulus is higher than the storage modulus, is this possible?
I attached both graphs, with the green coler being Loss modulus while the red is storage modulus.
I agree with Ross James Friel. The storage modulus determines the solid character, while the loss modulus determines the liquid character of a polymer. When the storage modulus is too high, it is more difficult to break down the polymer, making it harder to run through a nozzle extruder. With a high loss modulus, the polymer is too liquid and may start to flow out of the nozzle, and not hold its shape very well. A polymer suitable for 3D printing should have a balance between these two moduli. Preference is given to polymers with a storage modulus greater than the loss modulus, as they provide a material that retains its shape while being extrudable.