Thermal Degradation of Organic Dye for Recordable Optical Media

Abstract

The degradation of a dye on a compact disc-record able (CD-R) during recording was analyzed quantitatively using a spectroscopy and a thermal gravimetric analysis. It was found that the degradation resulting in the decrease of absorbance was completely different from mat accompanied by weight loss. The calculated temperature and the rate constants showed that the type of degradation with the decrease in absorbance due to partial bond cleavages of the dye molecules, not with weight loss, was a major one producing optical signals in the dye layer.