Why can it withstand high temperatures of 250°C to 300°C? What is the fundamental difference in molecular structure compared to standard Acrylate coatings?
Polyimide-coated optical fibers, such as OFSCN® SM Polyimide Optical Fiber, can withstand high temperatures ranging from 250°C to 300°C, and even up to 800°C with special processing, primarily due to the inherent thermal stability of polyimide polymers.
The fundamental differences in molecular structure compared to standard acrylate coatings are:
- Polyimide Coatings: These polymers contain stable imide rings and aromatic backbones. These strong chemical bonds and rigid ring structures require a significantly higher amount of energy to break, leading to superior thermal stability and a much higher glass transition temperature. This molecular architecture prevents degradation and maintains mechanical integrity at elevated temperatures.
- Acrylate Coatings: Standard acrylate coatings are typically based on organic monomers that polymerize to form flexible, but thermally less stable, polymer chains. Their molecular structure contains ester linkages and often aliphatic chains, which are more susceptible to thermal decomposition and oxidation at lower temperatures, typically around 80°C to 100°C. They also tend to exhibit creep at higher temperatures, affecting sensor stability.
DCYS offers various polyimide-coated products, including the OFSCN® Polyimide Fiber Bragg Gratings / Fiber Bragg Grating Strings (bare) which leverage this high-temperature resistance for stable operation in challenging environments.
Here is an image related to our polyimide fiber:
You can find more detailed technical parameters on our website:
OFSCN® SM Polyimide Optical Fiber
OFSCN® Polyimide Fiber Bragg Gratings / Fiber Bragg Grating Strings (bare)
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