Fraunhofer Institute for Applied Polymer Research
- © Fraunhofer IAP
Welcome on the website of the department Chromogenic Polymers at the Fraunhofer Institute for Applied Polymer Research. On the following pages we would like to introduce the field thermochromic polymers and present our current development work.
Thermochromic effects are based either on structural changes of functional dyes or on changes in the lattice constants of periodic structures. Focus of research at Fraunhofer IAP are dye systems on the basis of pH-indicator- or leuco dyes. In the leuco dye systems, we distinguish between conventional switch (from colored to colorless with increasing temperature) and inverse switch (from colorless to color with temperature increase).