| Author | Message | ||
     Thijs Metsemakers |
Hello, I would like to know how fast some polymers will heat up when they absorp IR-energy of 200-2000 nm. Does somebody know any kind of literature where I can find this information? Thanks Thijs | ||
| hlmark |
Thijs - Energy transfer via electromagnetic radiation is a well-studied phenomenon in physics and engineering (chemical and mechanical). But your question is much to vague as it stands. What is the source of radiation? What is it's strength? The size? The distance? The spectral distribution over the bandwidth? The absorption characteristics of the polymer? Etc., etc. If you're talking about a sample in a modern NIR instrument, There's anecdotal evidence that FTNIR instruments can deliver enough energy to heat samples up appreciably, and even burn some sensitive samples, especially if the full source energy is focussed on the sample. On the other hand, I know of no quantitative measurements of the effect. We could expect similar effects with other technologies that focus the full source bandwidth on the sample (e.g., diode arrays). Dispersion instruments (e.g., diffraction grating-based) should be free of that effect, however. |