DSC or Differential Scanning Calorimetry is a method of testing different samples through the use of heat. This process measures the amount of energy or heat needed to raise the temperature of the sample against a known reference material.
DSC testing is a relatively new testing method that was first demonstrated in 1962. However, the original standardized equipment used in labs wasn’t available until after 1964.
The Process
The use of differential scanning calorimetry is very precise. It works by measuring the rate of heat flow against a known sample. This can include transitioning between phases such as a solid to liquid or liquid to a gas.
In these types of transfers, heat is absorbed by the sample to create the phase change. The specific amount of heat can be measured against a reference both in heating as well as in exothermic processes such as crystallization. It is also used to measure the oxidation in a sample or the transition in a sample. As different components in the sample will have different measurements; the test can be used to determine each of the components acting on their own in the test.
Quality Control
The use of DSC testing stretches across many different industries and applications, but it is very useful in quality control testing of polymers. Through the testing, it is possible to determine if there are any unknown material or compounds in the sample.
Unusual or atypical results in the sample at the specific transformation or transition points verifies the presence of other substances in the analysis. This can be used to test both the end product as well as the various raw materials.
DSC testing is also highly effective in testing the polymer for oxidation and crystallization. This information will be necessary for determining if a given sample is a good match for a particular process or application.
