With our density gradient columns it is possible to measure the density of a polymeric sample. The principle of a Davenport density column is simple and accurate: two different organic “solvents” with different densities are mixed in such a way that a density profile over the height of the column is obtained. By applying floaters with a predefined density to the column a calibration curve can be prepared. Polymeric samples with unkown densities can now be measured.

The use of the right “solvents” is essential for a good measurement. The polymeric sample shouldn’t dissolve or swell in the “solvents”. So, infact we need non-solvents for the specific polymeric samples. Next to that a combination of “solvents” should be found with different densities and good miscibility in a specific density range. We can measure the following polymeric samples (pellets, yarns, etc).