Oxidation period test of PE, PPR and other pipes

The oxidation induction time (OIT) is tested by DSC (differential scanning calorimeter). The sample is usually heated to a specified temperature in a nitrogen atmosphere and kept at a constant temperature, and then switched to an oxygen atmosphere. After a period of time, the material begins to oxidize and release heat. This released heat is detected by the sensor, and the induced oxidation time (OIT) is obtained through software analysis. The length of the oxidation induction time is a parameter of the material’s resistance to oxidative decomposition, which is very meaningful. Usually, buried plastic pipes must test this parameter.