ISO 11357-6 Oxidative Stability Testing by DSC
The ISO 11357-6 standard provides a method to determine the oxidative stability of thermoplastics and elastomers. This thermal property test assesses the ability of materials to resist oxidation during processing or use, which is critical for ensuring product longevity and performance in various applications.
During this testing process, a sample undergoes heating at a controlled rate while simultaneously being subjected to an oxygen atmosphere. The temperature is increased gradually, and the heat flow differential scanning calorimetry (DSC) measures the amount of energy absorbed or released by the material as it reacts with oxygen. This reaction indicates the onset of oxidative degradation, providing a quantitative measure of the material’s resistance to oxidation.
The test begins by preparing the sample according to ISO 11357-6 specifications. The sample should be homogeneous and representative of the material being tested. It is then placed in the furnace where it is exposed to an oxygen atmosphere at a controlled heating rate, typically between 10°C/min to 20°C/min. The process generates a thermogram that plots the heat flow against temperature.
The primary output from this test is the oxidative induction time (OIT), which represents the period during which the material remains stable before oxidation begins. This value provides valuable insights into the thermal stability of the polymer, helping manufacturers optimize processing conditions and improve product durability.
The results are reported as a function of temperature and may include additional parameters such as the maximal heat flow, which indicates the peak rate of heat absorption during oxidation, and the total heat effect. These metrics help in understanding not only the onset but also the extent of oxidative degradation.
The testing procedure is crucial for quality managers, compliance officers, R&D engineers, and procurement specialists. It ensures that the materials used meet stringent standards and are suitable for their intended applications. This test is particularly important in sectors like automotive, aerospace, electronics, and medical devices where material stability under heat and oxygen exposure is paramount.
The accuracy of ISO 11357-6 testing depends on precise sample preparation and controlled experimental conditions. Any deviation from these can lead to inaccurate results, emphasizing the importance of adhering strictly to the standard’s guidelines.
Applied Standards
The test described herein is based primarily on ISO 11357-6:2009, which provides comprehensive details for performing oxidative stability testing by DSC. This international standard ensures that the testing procedure and interpretation are consistent across different laboratories.
In addition to the core requirements outlined in ISO 11357-6, other relevant standards may apply depending on the specific material being tested. For instance, ASTM E2048 covers similar ground for elastomers, while EN 14496 is applicable for thermoplastics. Compliance with these standards ensures that the test results are not only accurate but also internationally recognized.
The use of standardized protocols like ISO 11357-6 helps in comparing data across different laboratories and industries, facilitating better decision-making based on consistent and reliable information.
Industry Applications
| Industry | Application |
|---|---|
| Automotive | Evaluating the durability of interior and exterior components under prolonged heat and oxidative stress. |
| Aerospace | Ensuring the integrity of composite materials used in aircraft structures during high-altitude operations. |
| Electronics | Testing the resistance of circuit board materials to oxidation, which is crucial for long-term reliability. |
| Medical Devices | Assessing the stability of biocompatible materials used in medical implants and devices. |
| Construction | Evaluating the performance of polymers in roofing membranes and other outdoor applications exposed to UV light and heat. |
| Petrochemicals | Testing polymer additives for their ability to withstand oxidative degradation during processing and storage. |
| Consumer Products | Ensuring the longevity of plastic components in household appliances that are exposed to high temperatures. |
The versatility of ISO 11357-6 testing makes it indispensable across numerous industries. By ensuring that materials can withstand oxidative degradation, this test supports innovation and quality assurance in sectors where material stability is critical.
Eurolab Advantages
EuroLab offers unparalleled expertise in ISO 11357-6 testing, providing clients with comprehensive support from sample preparation to result interpretation. Our state-of-the-art facilities and experienced technicians ensure that every test adheres strictly to the international standards.
Our multi-disciplinary team includes specialists in materials science, chemical engineering, and quality assurance who collaborate closely throughout each project. This ensures that our testing not only meets but exceeds industry expectations.
We pride ourselves on delivering accurate, reliable results within tight deadlines. Our clients can trust us to provide actionable insights into their material’s oxidative stability, aiding them in making informed decisions about product design and manufacturing processes.
Moreover, EuroLab supports clients with detailed reports that include all relevant parameters such as OIT, maximal heat flow, and total heat effect. These reports are tailored to the specific needs of our clients, offering clear guidance on how to improve material performance or optimize processing conditions.
