| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Aging and Compatibility: Experimental and Computational Approaches to Enable Lifetime Predictions
|
| Presentation Title |
Accelerated oxidation of epoxy thermosets with increased O2 pressure |
| Author(s) |
Mathew Celina, Carl Erik Linde, Matija Barrett, Lisa Ko |
| On-Site Speaker (Planned) |
Carl Erik Linde |
| Abstract Scope |
Polymer oxidation is usually accelerated with temperature, which is therefore applied in nearly every experimental approach dealing with predictive materials aging. Because of this simple approach, we may tend to neglect that the effective concentration of oxygen also acts as a rate multiplier for oxidation, i.e., increasing the oxygen partial pressure in an aging environment accelerates oxidation. In this talk, we discuss the theoretical impact of increased partial pressure on diffusion-limited oxidation (DLO), as described in the general autooxidation scheme, and review epoxy oxidation to offer a broader overview of its behavior under increased O2 partial pressure. We also give examples of oxidation rates as a function of temperature and pressure for a few thermoset materials under moderately increased oxygen concentrations (up to 4 atm, or 20 times atmospheric O2), and discuss how the rate behavior affects the accelerated aging of these materials. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Polymers, |