Oxidative-induction time

Oxidation-induction time can be known with the use of Differential Scanning Calorimetry measurements, which is done with the sample body and a substance that will be heated in a constant rate in an atmosphere of inert gas.

The specimen will be then held at a constant temperature up to the indication of oxidative reaction by exothermal deviation of DSC heat flow curve.

Time interval in the middle of the start of the air flow and the beginning of the oxidation reaction is called the isothermal OIT.

The said method was also mentioned and discussed on several various technical standards like DIN EN ISO 11357-6.

[1] This test is routine when assessing the quality of organic materials or polymers, such as polyethylene pipes.

Characteristic DSC curve for a polyethylene, the OIT is measured