Ozone Resistance Testing Services for Rubber & Polymers
Ozone testing is used to evaluate the performance of rubbers and elastomers in the presence of ozone (trioxygen and inorganic in nature) and to study the resistance of a particular material to ozone degradation. The need arises when polymers, more specifically elastomers, undergo cracking due to naturally occurring ozone.
TRUSTED BY
- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
Ozone Testing – Overview
Ozone testing evaluates the resistance of materials, particularly elastomers and polymers, to degradation caused by ozone exposure. Ozone reacts with susceptible chemical bonds, especially in unsaturated polymers, leading to surface cracking, embrittlement, and eventual loss of mechanical performance under stress.
The testing simulates real environmental conditions by exposing samples to controlled ozone concentration, temperature, humidity, and strain. It enables accurate assessment of material durability, prediction of service life, and identification of failure mechanisms in ozone-rich operating environments.
Scope, Applications, and Benefits
Scope
Ozone testing focuses on analyzing the effects of ozone-induced oxidation on materials under controlled environmental and mechanical conditions to determine durability and resistance.
It includes evaluation of crack initiation, propagation behavior, and the influence of key parameters such as ozone concentration, strain, and temperature, providing a comprehensive understanding of material performance in service conditions.
- Measurement of ozone-induced surface cracking behavior
- Evaluation under static and dynamic strain conditions
- Analysis of ozone concentration effects on degradation rate
- Assessment of temperature and humidity influence
- Testing of elastomers, rubber, and polymeric materials
- Comparative evaluation of formulations and additives
- Determination of environmental aging resistance
- Verification of compliance with relevant testing standards
Applications
- Automotive rubber seals and components
- Industrial gaskets and O-rings
- Electrical insulation materials
- Tire and tubing products
- Outdoor polymer components
- Aerospace sealing systems
Benefits
- Identifies susceptibility to ozone cracking
- Improves material durability and reliability
- Supports optimized formulation development
- Reduces risk of premature failure
- Enables compliance with industry standards
- Enhances performance in outdoor environments
Ozone Testing – Test Process
Sample Preparation & Controlled Conditioning
Specimens are prepared and conditioned under defined temperature and humidity to stabilize material properties.
1Strain Application & Secure Mounting Setup
Samples are mounted under specified elongation or kept relaxed depending on testing requirements
2Ozone Exposure in Regulated Chamber Conditions
Specimens are exposed to controlled ozone concentration, temperature, and airflow for a defined duration.
3Crack Observation & Detailed Performance Evaluation
Surface cracks are evaluated visually or microscopically to determine resistance and degradation severity.
4Ozone Testing – Technical Specification
| Parameter | Details |
|---|---|
| Test Method | Controlled ozone exposure testing |
| Measurement Type | Crack initiation and propagation analysis |
| Sample Type | Elastomers, rubber, and polymer materials |
| Loading Type | Static or dynamic strain conditions |
| Units | Crack length (mm), crack density, time to crack initiation |
| Ozone Concentration | Typically 25–200 pphm |
| Temperature Range | Controlled (typically 20–40°C or specified conditions) |
Instrumentation Used for Testing
- Ozone test chamber
- Ozone generator and analyzer
- Strain fixtures and elongation frames
- Optical microscope or magnifier
- Environmental control system
- Specimen holding fixtures
Results and Deliverables
- Time to crack initiation
- Crack size, density, and distribution
- Visual and microscopic inspection data
- Material resistance classification
- Compliance with applicable standards
- Detailed analytical test report
Partnering with Infinita Lab for Optimal Results
Infinita Lab addresses the most frustrating pain points in the Ozone testing process: complexity, coordination, and confidentiality. Our platform is built for secure, simplified support, allowing engineering and R&D teams to focus on what matters most: innovation. From kickoff to final report, we orchestrate every detail—fast, seamlessly, and behind the scenes.
Looking for a trusted partner to achieve your research goals? Schedule a meeting with us, send us a request, or call us at (888) 878-3090 to learn more about our services and how we can support you. Request a Quote
Frequently Asked Questions
Ozone reacts with unsaturated carbon–carbon double bonds in polymers, causing chain scission at the surface. This weakens the material locally, leading to crack initiation and eventual propagation under applied or residual stress conditions.
Many elastomers contain unsaturated bonds that are highly reactive with ozone. Their flexibility also allows stress concentration, making them more susceptible to surface cracking compared to more rigid or saturated polymer structures.
Strain increases molecular alignment and stress concentration, exposing reactive sites to ozone. This accelerates crack initiation and directs crack growth perpendicular to the direction of applied tensile stress.
Ozone reacts with carbon–carbon double bonds in unsaturated polymers, causing chain scission at the surface. This localized degradation weakens the material and leads to crack initiation under mechanical or residual stress conditions.
Elastomers often contain unsaturated bonds and experience higher deformation during service. This combination increases exposure of reactive sites and promotes stress-assisted cracking, making them more vulnerable to ozone-induced degradation.
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