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The determination of the oxidation induction time (OIT) and the oxidation onset temperature (OOT) are standard procedures frequently used to rapidly compare and assess the oxidative stability of materials.
The same methods can be used to study aging processes and the effectiveness of stabilizers. The use of higher pressures suppresses the vaporization of volatile components, increases the rate of oxidation and shortens measurement times.
Many organic compounds are attacked by oxygen and undergo oxidation reactions even at low temperatures. Materials and substances such as plastics, greases, oils and fats are easily investigated by thermal analysis techniques. Oxidation stability can be characterized by OIT or OOT. The OIT of a material is measured in an oxygen atmosphere at a particular isothermal temperature whereas the OOT is determined in a dynamic measurement in oxygen. OOT experiments are performed more rapidly. Thermal analysis is an excellent method for investigating oxidation stability. Only a few milligrams of sample are required and the measurement is quickly performed. It can even be automated.
The presentation covers the following topics:
- OIT and OOT methods
- Why use TA
- Industries and applications
- Different instruments for the measurement of OIT and OOT
– HP DSC
In this presentation, we will discuss the different methods used to investigate the oxidation behavior of materials and present some interesting applications.