Ozone Effect Module
Ozone is a trace gas that strongly reacts with some rubbers to produce surface cracking following exposure. Ozone cracking can limit useful product life, even when mechanical cycles operate below the mechanical fatigue threshold. The Endurica ozone attack testing method determines: ℇz the critical strain for ozone attack; Tz the critical tearing energy for ozone attack; and rz the rate of crack growth due to ozone attack.
Required when rubber that has a susceptibility to ozone attack is operating in an environment with ozone.
Experiment Overview
- images of crack development on specimen
- 3 replicates
- number of slabs needed for test: 1
Default exposure: 50 pphm O3 concentration, 72 hrs @ room temperature 23°C
Analysis and Reporting / Deliverables • determine
- ℇ𝑧 – critical strain
- determine 𝑟𝑧 – ozone crack growth rate
- determine 𝑇𝑧 – critical energy for ozone attack
Use with
- Williams ozone attack model
- Gent-McGrath ozone attack model
